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Abstract: Sex and gender influence every aspect of human health; thus, sex- and gender-related topics should be incorporated in all aspects of health education curricula. Sex and gender health education (SGHE) is the rigorous, intersectional, data-driven integration of sex and gender into all elements of health education. A multisectoral group of thought leaders has collaborated to advance SGHE since 2012. This cross-sector collaboration to advance SGHE has been successful on several fronts, primarily developing robust interprofessional SGHE programs, hosting a series of international SGHE summits, developing sex- and gender-specific resources, and broadening the collaboration beyond medical education. However, other deeply entrenched challenges have proven more difficult to address, including accurate and consistent sex and gender reporting in research publications, broadening institutional support for SGHE, and the development and implementation of evaluation plans for assessing learner outcomes and the downstream effects of SGHE on patient care. This commentary reflects on progress made in SGHE over the first decade of the current collaboration (2012-2022), articulates a vision for next steps to advance SGHE, and proposes 4 benchmarks to guide the next decade of SGHE: (1) integrate sex, gender, and intersectionality across health curricula; (2) develop sex- and gender-specific resources for health professionals; (3) improve sex and gender reporting in research publications; and (4) develop evaluation plans to assess learner and patient outcomes., (Copyright © 2023 Written work prepared by employees of the Federal Government as part of their official duties is, under the U.S. Copyright Act, a “work of the United States Government” for which copyright protection under Title 17 of the United States Code is not available. As such, copyright does not extend to the contributions of employees of the Federal Government.)

Objective: To describe the clinical, endoscopic, and histologic features in patients with acute esophageal necrosis (AEN)., Patients and Methods: In this retrospective cohort study, patients who were diagnosed as having AEN at Mayo Clinic sites in Minnesota, Florida, and Arizona between January 1, 1996, and January 31, 2021, were included. Data were collected on patient clinical characteristics and endoscopic and pathologic findings., Results: The study included 79 patients with AEN with a median (range) age of 64 years (12 to 91 years); 53 (67.1%) were men. Predominant presenting symptoms were hematemesis (49 of 79 [62.0%]), abdominal pain (29 [36.7%]), and melena (20 [25.3%]). Shock was the triggering event for AEN in 49 (62.0%). The 30- and 90-day mortality were 24.0% (19 of 79) and 31.6% (25), respectively. The presence of coexisting infection or bacteremia was significantly associated with 90-day mortality (P<.01). Endoscopically, involvement of the distal third only, distal two-thirds only, and entire esophagus was observed in 31.6% (24 of 76), 39.5% (30), and 29.0% (22), respectively. The length of esophageal involvement correlated with duration of hospitalization (P=.05). The endoscopic appearance of the esophageal mucosa ranged from predominantly white (21 of 44 [47.7%]) to mixed white and black (13 [29.6%]) to predominantly black (10 [22.7%]), and sloughing was present in 18 (40.9%). In the 26 patients with histopathologic findings available for review, 25 (96.1%) had necrosis and/or ulceration with abundant pigmentation. Among the 79 patients, 39 (49.4%) had a follow-up esophagogastroduodenoscopy; 26 of these 39 patients (66.7%) had resolution while 5 had persistent AEN, 4 of whom had improvement. Esophageal strictures developed in 7 of the 39 patients (18.0%)., Conclusion: Acute esophageal necrosis is a serious condition observed in critically ill patients. Its endoscopic appearance can be highly variable. In patients with an unclear diagnosis, esophageal biopsies may be helpful given the characteristic histologic findings., (Copyright © 2022 Mayo Foundation for Medical Education and Research. Published by Elsevier Inc. All rights reserved.)

Polyphenon E (Poly E) is a green tea polyphenol preparation whose most active component is epigallocatechin gallate (EGCG). We studied the cancer preventive efficacy and safety of Poly E in subjects with rectal aberrant crypt foci (ACF), which represent putative precursors of colorectal cancers. Eligible subjects had prior colorectal advanced adenomas or cancers, and had ≥5 rectal ACF at a preregistration chromoendoscopy. Subjects ( N = 39) were randomized to 6 months of oral Poly E (780 mg EGCG) daily or placebo. Baseline characteristics were similar by treatment arm (all P >0.41); 32 of 39 (82%) subjects completed 6 months of treatment. The primary endpoint was percent reduction in rectal ACF at chromoendoscopy comparing before and after treatment. Among 32 subjects (15 Poly E, 17 placebo), percent change in rectal ACF number (baseline vs. 6 months) did not differ significantly between study arms (3.7% difference of means; P = 0.28); total ACF burden was also similar (-2.3% difference of means; P = 0.83). Adenoma recurrence rates at 6 months were similar by arm ( P > 0.35). Total drug received did not differ significantly by study arm; 31 (79%) subjects received ≥70% of prescribed Poly E. Poly E was well tolerated and adverse events (AE) did not differ significantly by arm. One subject on placebo had two grade 3 AEs; one subject had grade 2 hepatic transaminase elevations attributed to treatment. In conclusion, Poly E for 6 months did not significantly reduce rectal ACF number relative to placebo. Poly E was well tolerated and without significant toxicity at the dose studied. PREVENTION RELEVANCE: We report a chemoprevention trial of polyphenon E in subjects at high risk of colorectal cancer. The results show that polyphenon E was well tolerated, but did not significantly reduce the number of rectal aberrant crypt foci, a surrogate endpoint biomarker of colorectal cancer., (©2021 American Association for Cancer Research.)

Difluoromethylornithine (DFMO), an inhibitor of polyamine synthesis, was shown to act synergistically with a NSAID for chemoprevention of colorectal neoplasia. We determined the efficacy and safety of DFMO plus aspirin for prevention of colorectal adenomas and regression of rectal aberrant crypt foci (ACF) in patients with prior advanced adenomas or cancer. A double-blinded, placebo-controlled trial was performed in 104 subjects (age 46-83) randomized (1:1) to receive daily DFMO (500 mg orally) plus aspirin (325 mg) or matched placebos for one year. All polyps were removed at baseline. Adenoma number (primary endpoint) and rectal ACF (index cluster and total) were evaluated at a one year colonoscopy. ACF were identified by chromoendoscopy. Toxicity was monitored, including audiometry. Eighty-seven subjects were evaluable for adenomas or ACF modulation ( n = 62). At one year of treatment, adenomas were detected in 16 (38.1%) subjects in the DFMO plus aspirin arm ( n = 42) versus 18 (40.9%) in the placebo arm ( n = 44; P = 0.790); advanced adenomas were similar ( n = 3/arm). DFMO plus aspirin was associated with a statistically significant reduction in the median number of rectal ACF compared with placebo ( P = 0.036). Total rectal ACF burden was also reduced in the treatment versus the placebo arm relative to baseline (74% vs. 45%, P = 0.020). No increase in adverse events, including ototoxicity, was observed in the treatment versus placebo arms. While adenoma recurrence was not significantly reduced by one year of DFMO plus aspirin, the drug combination significantly reduced rectal ACF number consistent with a chemopreventive effect., (©2019 American Association for Cancer Research.)

Increasing rates of burnout-with accompanying stress and lack of engagement-among faculty, residents, students, and practicing physicians have caused alarm in academic medicine. Central to the debate among academic medicine's stakeholders are oft-competing issues of social accountability; cost containment; effectiveness of academic medicine's institutions; faculty recruitment, retention, and satisfaction; increasing expectations for faculty; and mission-based productivity.The authors propose that understanding and fostering what contributes to faculty and institutional vitality is central to preventing burnout during times of change. They first look at faculty vitality and how it is threatened by burnout, to provide a framework for a greater understanding of faculty well-being. Then they draw on higher education literature to determine how vitality is defined in academic settings and what factors affect faculty vitality within the context of academic medicine. Next, they propose a model to explain and examine faculty vitality in academic medicine, followed by a discussion of the need for a greater understanding of faculty vitality. Finally, the authors offer conclusions and propose future directions to promote faculty vitality.The authors encourage institutional decision makers and other stakeholders to focus particular attention on the evolving expectations for faculty, the risk of extensive faculty burnout, and the opportunity to reduce burnout by improving the vitality and resilience of these talented and crucial contributors. Faculty vitality, as defined by the institution, has a critical role in ensuring future institutional successes and the capacity for faculty to thrive in a complex health care economy.

Background: Addressing healthcare disparities is a national priority for initiatives in precision and individualized medicine. An essential component of precision medicine is the understanding that sex and gender influence health and disease. Whether these issues are addressed in post-graduate medical education curricula is unknown., Methods: A questionnaire was designed and administered to residents across the Mayo Clinic enterprise to assess current knowledge of sex and gender medicine in a large program of post-graduate medical education and to identify barriers and preferred teaching methods for addressing sex and gender issues in health and disease. Descriptive and qualitative thematic analyses of the survey responses were compiled and analyzed., Results: Responses were collected from 271 residents (response rate 17.2 %; 54 % female; 46 % male). A broad cross-section of training programs on all Mayo Clinic campuses (Arizona, Minnesota, and Florida) was represented. Sixteen percent of the respondents reported they had never had an instructor or preceptor discuss how a patient's sex or gender impacted their care of a patient; 55 % said this happened only occasionally. Of medical knowledge questions about established sex- and gender-related differences, 48 % were answered incorrectly or "unsure." Qualitative thematic analysis showed that many trainees do not understand the potential impact of sex and gender on their clinical practice and/or believe it does not pertain to their specialty. A higher percentage of female participants agreed it was important to consider a patient's sex and gender when providing patient care (60.4 vs. 38.7 %, p  =  0.02), and more male than female participants had participated in research that included sex and/or gender as a variable (59.6 vs. 39.0 %, p  < 0.01)., Conclusions: Curriculum gaps exist in post-graduate medical training regarding sex- and gender-based medicine, and residents often do not fully understand how these concepts impact their patients' care. Reviewing the definition of sex- and gender-based medicine and integrating these concepts into existing curricula can help close these knowledge gaps. As the practice of medicine becomes more individualized, it is essential to equip physicians with an understanding of how a patient's sex and gender impacts their health to provide the highest value care.

Sex, a biological variable, and gender, a cultural variable, define the individual and affect all aspects of disease prevention, development, diagnosis, progression, and treatment. Sex and gender are essential elements of individualized medicine. However, medical education rarely considers such topics beyond the physiology of reproduction. To reduce health care disparities and to provide optimal, cost-effective medical care for individuals, concepts of sex and gender health need to become embedded into education and training of health professionals. In September 2012, Mayo Clinic hosted a 2-day workshop bringing together leading experts from 13 U.S. schools of medicine and schools of public health, Health Resources and Services Administration Office of Women's Health (HRSA OWH), the National Institutes of Health (NIH) Office of Research on Women's Health (ORWH), and the Canadian Institute of Health and Gender. The purpose of this workshop was to articulate the need to integrate sex- and gender-based content into medical education and training, to identify gaps in current medical curricula, to consider strategies to embed concepts of sex and gender health into health professional curricula, and to identify existing resources to facilitate and implement change. This report summarizes these proceedings, recommendations, and action items from the workshop.

The last several decades have seen a large increase in knowledge of the underlying biological mechanisms that serve learning and memory. The insights gleaned from neurobiological and cognitive neuroscientific experimentation in humans and in animal models have identified many of the processes at the molecular, cellular, and systems levels that occur during learning and the formation, storage, and recall of memories. Moreover, with the advent of noninvasive technologies to monitor patterns of neural activity during various forms of human cognition, the efficacy of different strategies for effective teaching can be compared. Considerable insight has also been developed as to how to most effectively engage these processes to facilitate learning, retention, recall, and effective use and application of the learned information. However, this knowledge has not systematically found its way into the medical education process. Thus, there are considerable opportunities for the integration of current knowledge about the biology of learning with educational strategies and curricular design. By teaching medical students in ways that use this knowledge, there is an opportunity to make medical education easier and more effective. The authors present 10 key aspects of learning that they believe can be incorporated into effective teaching paradigms in multiple ways. They also present recommendations for applying the current knowledge of the neurobiology of learning throughout the medical education continuum., (© by the Association of American Medical Colleges.)

From its inception more than a century ago, Mayo Clinic's founders instilled the core value, the needs of the patient come first, into the institution's culture. Today, this core value of professionalism continues to guide the clinic's leadership practices, management strategies, and daily activities. Members of the Mayo Clinic staff embrace and reinforce this core value and regard it as a professionalism covenant: a collective, tacit agreement that everyone will earnestly collaborate to put the needs and welfare of patients first. This covenant is articulated for patients and learners in two key documents, both crafted in 2001--the Mayo Clinic Model of Care, and the Mayo Clinic Model of Education--and is reaffirmed through Mayo Clinic's mission to provide the best outcomes, service, and value in health care to every patient, every day. Mayo's value-based culture serves as a powerful, positive hidden curriculum that facilitates the accomplishment of desired practice and educational outcomes and fosters the development of health care professionals with the highest standards of professionalism. The profound allegiance of Mayo Clinic staff and students to its patient-centered culture connects all to the purpose and meaning of their work, elicits collaboration and voluntary efforts, and fosters an environment that is committed to excellence and continuous improvement. In the context of contemporary challenges and competing commitments facing academic health centers, the authors discuss key initiatives that Mayo Clinic has implemented to preserve the institution's culture, honor the professionalism covenant, and enable faculty, staff, and learners to align their behaviors, work activities, and resources to accomplish the institution's mission.

Objective: This study aimed to establish documentation standards for medical education activities, beyond educational research, for academic promotion consistent with principles of excellence and scholarship., Methods: In 2006 a Consensus Conference on Educational Scholarship was convened by the Association of American Medical Colleges (AAMC) Group on Education Affairs (GEA) to outline a set of documentation standards for use by educators and academic promotion committees. Conference participants' work was informed by more than 15 years of literature on scholarship, educator portfolios and academic promotion standards., Results: The 110 conference participants, including medical school deans, academic promotion committee members, department chairs, faculty and AAMC leaders, re-affirmed the 5 education activity categories (teaching, curriculum, advising and/or mentoring, education leadership and/or administration, and learner assessment), the contents of each category, and cross-category documentation standards. Educational excellence requires documentation of the quantity and quality of education activities. Documenting a scholarly approach requires demonstrating evidence of drawing from and building on the work of others, and documenting scholarship requires contributing work through public display, peer review and dissemination; both involve engagement with the community of educators. Implementation of these standards - quantity, quality and engagement with the education community - should occur in parallel with the development of an infrastructure to support educators, including sustained faculty development for educators, access to educational resources and journals, peer review mechanisms and consultation and support specific to each activity category., Conclusions: Educators' contributions to their institutions must be visible to be valued. The establishment of documentation standards for education activities provides the foundation for academic recognition of educators.

Outcome-based education is one of the most significant global developments in medical education in recent years. This paper presents four case studies of outcome-based education from medical schools in different parts of the world; Scotland; USA; Pakistan; and Singapore. The outcome-based curricula have either been in place for some time, are evolving or are at the planning proposal stage. The outcomes, change process and implementation of the outcome-based approach are described. Variation in the extent to which each medical school has implemented outcome-based education is discussed and key points for successful implementation are highlighted. This paper is based on the pre-conference symposium "outcome-based curricula: global perspectives" presented by the authors at the 4th Asia Pacific Medical Education Conference (APMEC) in Singapore, 8-11 February, 2007.

Introduction: Today's physicians must demonstrate both professionalism and leadership skills in order to succeed in largely team-based healthcare environments. The purpose of this study was to determine if professionalism attributes, leadership style, and leadership style adaptability are associated with academic performance among first-year students early in their medical curriculum., Materials and Methods: Students were divided into 4-member dissection groups for the duration of the Gross and Developmental Anatomy course. Leadership responsibility was randomly assigned to a team member on a rotating basis every 5 weeks. After each 5-week block, student performance was measured by written and practical examinations, and each student assessed their leader's or their own professionalism attributes and leadership style using validated survey instruments., Results: Most students demonstrated either a "selling" only (57%) or "participating" only (30%) leadership style with low to moderate leadership adaptability. "Participating" and "delegating" leadership styles have the highest average group written exam scores (89.4%, P <0.008). "Telling" only or "selling" only leaders have the lowest average group exam scores (83.5%, P <0.001). "Selling" and "participating" leaders have significantly lower average group practical exam scores than other styles (81.5%, P <0.007). Positive associations were observed between the written and practical examination scores and the leader's integrity (P = 0.003, P = 0.002) and responsibility (P <0.001, P = 0.037)., Conclusions: This study demonstrates that various situational leadership styles and aspects of professionalism are associated with written and practical examination scores in the Gross and Developmental Anatomy course. Furthermore, it demonstrates that first-year medical students are in need of leadership skill development.

Black esophagus is the uncommon endoscopic finding of extensive black discoloration of the esophageal mucosa, usually from acute esophageal necrosis. Six cases of black esophagus were seen at Mayo Clinic (Rochester, Minnesota, USA) from 1997 through 2003, and 46 cases were reported in the English-language literature from 1963 through 2003. We studied the demographics, clinical features, and outcomes of these 52 cases of black esophagus. Age and sex were known for 50 patients: the mean (SD) age was 65 years (19), and 42 patients (84%) were men. Symptoms were known for 51 patients: the most common symptom was upper gastrointestinal tract bleeding, occurring in 40 patients (78%). All 52 patients had at least one comorbid condition (with most having two or more), including duodenal ulcer in 17 (33%), cancer in 15 (29%), renal insufficiency in 15 (29%), and diabetes mellitus in 14 (28%). The suspected cause of black esophagus was reported for 40 patients: ischemia in 22 (55%); massive gastroesophageal reflux in seven (18%); and esophageal infection (Lactobacillus acidophilus, herpes simplex, Candida albicans) in four (10%). Most patients received supportive therapy, particularly acid suppression therapy. Of the 47 patients for whom outcomes were known, 17 (36%) died. There were no statistically significant differences between survivors and non-survivors. Black esophagus typically occurs in older men with at least one comorbid condition; a substantial number of patients die. Although the underlying mechanism leading to black esophagus is unknown, clinicians caring for patients with black esophagus should focus on optimizing perfusion, minimizing acid reflux, and treating esophageal infection if present.

Introduction: As today's healthcare model moves toward more streamlined and corporate industrialism, it is our responsibility, as doctors, to ensure the integrity of medicine's foundation in professionalism. The erosion of professional values not only creates a climate of animosity, but reverberates negatively to impact the development of students, who model their behaviour after those they most respect. This hazard has spurred an evaluation of medical school curricula, with a new emphasis on professionalism in the philosophy of medical education. Courses such as Gross Anatomy that, in the past, offered "pure content," are now being used to teach and evaluate professionalism. The goal of this study was to determine if peer evaluation and self-evaluation used in conjunction and implemented early in the medical curriculum, can serve as useful tools to assess and provide feedback regarding professional behaviour in first-year medical students., Materials and Methods: From 1999 to 2003, students at Mayo Clinic College of Medicine evaluated themselves and their peers during the Gross and Developmental Anatomy Course. Numerical evaluations and written comments were statistically analysed within established categories of professionalism and correlated with academic performance, gender, and peer rating and self-rating., Results: The majority of written comments pertained to inter-professional respect, responsibility, and excellence. Students who gave higher peer evaluation and self-evaluation scores provided more positive comments, and students performing well in the course provided more positive comments about their peers and themselves than did those struggling academically. Students consistently rated their peers higher than themselves, and male students rated themselves higher than did female students., Conclusions: Implementing peer evaluation and self-evaluation early in the medical curriculum is a valuable exercise in teaching first-year medical students assessment skills when evaluating their behaviour, as well as the behaviour of their colleagues.

Objective: Gastric antral vascular ectasia (GAVE) has been recognized as a rare but important cause of chronic iron deficiency anemia. A number of reported patients were found to have evidence of autoimmune disorders or connective tissue diseases. We carried out this study in order to determine the clinical, endoscopic, and pathologic features in a large series of patients with systemic sclerosis (SSc) who were diagnosed with GAVE. We also determined the response to YAG laser treatment for chronic blood loss in these patients., Methods: A retrospective chart review of 20 cases diagnosed over an 11-year period, with diagnoses of both SSc and GAVE., Results: Twenty patients with SSc presented with prominent anemia and were diagnosed with GAVE. Treatment with endoscopic laser therapy was successful in preventing surgery for bleeding in GAVE in 85% of cases., Conclusions: GAVE should be considered in patients with SSc who develop chronic iron deficiency anemia. YAG laser treatment can be useful in the treatment of chronic blood loss anemia in SSc patients with GAVE.

In 1998, the Board of Governors of the Mayo Clinic requested that the Education Committee design and implement a program to grant time and resources to clinical faculty to support the development of educational projects. The essence of the resulting Clinician-Educator Award Program is the concept of using funding to award time and resources for educational projects judged to be meritorious by an impartial, peer-review-based faculty mentoring process. The authors report early experiences with the program, which was enthusiastically accepted by faculty, to provide a model to help other academic health centers, especially those with salary-based faculty, to facilitate educational innovation and scholarship despite the growing constraints on academic clinicians' time and resources.

The value of endoscopic palliative therapy for malignant obstruction in the proximal esophagus has been questioned. To assess the importance of pre-treatment performance status on treatment outcome, we reviewed the records of patients with tumors of the proximal esophagus undergoing endoscopic laser therapy between January 1986 and December 1988. As compared with 10 patients having a good performance status, eight patients with a poor performance status had a lower frequency of obtaining complete functional relief of dysphagia (14% versus 71%), an increased rate of complications (50% versus 0%), and a shorter median survival time (24 days versus 161 days). We conclude that performance status should be considered in determining the appropriateness of laser therapy in patients with proximal esophageal cancer.

The clinical and endoscopic features of patients diagnosed with acute bleeding due to portal hypertensive gastropathy (PHG) were evaluated. Acute bleeding from PHG was diagnosed in 12 patients (0.8%) of 1496 patient admissions prospectively evaluated by our Gastrointestinal Bleeding Team over a 3-yr period, and accounted for 8% of nonvariceal bleeding diagnosed in patients with liver disease. The median age of PHG patients (8M:4F) was 66 yr (range, 37-72). The most common underlying liver disease was alcoholic cirrhosis (five patients). The majority of patients presented with melena. There was no hemodynamic instability. Six patients had prior sclerotherapy. Esophageal varices, grades 1 (five patients) and 2 (three patients), were present. Severe PHG was encountered in seven patients. There was no correlation between the presence or absence of varices, the grade of esophageal varices, and prior sclerotherapy on the severity of PHG or continued bleeding. The mean hospital stay was 6 days. An average of 4 units of blood was transfused per patient (range, 2-8). Continued bleeding occurred in nine patients (75%), one of whom had mild PHG. Two patients with continued bleeding subsequently were diagnosed with portal hypertensive vasculopathy distal to the stomach. There was one episode of encephalopathy and no related mortality. Acute (overt) bleeding from PHG is uncommon, likely to recur, and can evolve into a pattern of chronic blood loss.

Unlabelled: Endoscopic laser coagulation effectively controls bleeding from radiation-induced rectal vascular lesions., Objective: To assess the outcome of endoscopic treatment of radiation-induced bleeding due to vascular lesions located proximal to the sigmoid colon., Methods: We identified 15 consecutive patients with such proximal radiation enteropathy treated at our Institution with Nd:YAG laser between 1984 and 1991. Ten patients (66%) had gastric and/or small bowel involvement, and five (33%) had colonic involvement with or without more proximal lesions. Bleeding first appeared at a mean of 21.2 +/- 12.5 months after completion of radiotherapy. Mean duration of gastrointestinal bleeding before laser treatment was 7.6 +/- 4.6 months., Results: After completion of laser therapy, bleeding ceased in nine (60%) patients, decreased in three (20%), and persisted in three (20%). The mean hemoglobin level increased from 8.4 +/- 0.5 g/dl to 10.4 +/- 0.6 g/dl after completion of laser treatments (p < 0.02). The mean number of transfusions per patient per year decreased from 10.5 +/- 2.8 to 0.9 +/- 0.7 (p < 0.01). No treatment-related complications or deaths occurred., Conclusions: Endoscopic laser coagulation of radiation-induced mucosal vascular lesions in the upper gastrointestinal tract and proximal colon appears to be safe and, in most cases, effective.

Hematochezia from mucosal vascular lesions usually confined to the rectum represents an uncommon but problematic late complication of pelvic radiotherapy. We studied 47 patients with medically refractory hematochezia resulting from radiation-induced rectosigmoid mucosal vascular lesions. All lesions were endoscopically coagulated with Nd:YAG laser. Median duration of hematochezia before laser therapy was 11 months, despite previous medical treatment (98%) or bypass colostomy (6%). Within 3 to 6 months after laser treatment, the number of patients with daily hematochezia fell from 40 (85%) to 5 (11%; p < 0.001), and the median hemoglobin level increased from 9.7 gm/dl to 11.7 gm/dl (p < 0.001). Complications occurred in three patients (6%); no deaths occurred. The condition in six patients (12.8%) was not improved by laser treatment. Two patients (4%) ultimately required surgical treatment for bleeding control. On the basis of symptomatic, hematologic, and endoscopic responses, Nd:YAG laser photocoagulation controlled bleeding from radiation proctopathy in most patients with an acceptably low morbidity. Patients with sigmoid colon involvement responded less favorably. Endoscopic laser photocoagulation should be considered before surgical intervention for treatment of hematochezia from radiation proctopathy.

The watermelon stomach is an uncommon but treatable cause of chronic gastrointestinal bleeding. We report our experience with the clinical and endoscopic features of 45 consecutive patients treated by endoscopic Nd:YAG laser coagulation. The prototypic patient was a woman (71%) with an average age of 73 years (range of 53-89 years) who presented with occult (89%) transfusion-dependent (62%) gastrointestinal bleeding over a median period of 2 years (range of 1 month to > 20 years). Autoimmune connective tissue disorders were present in 28 patients (62%), especially Raynaud's phenomena (31%) and sclerodactyly (20%). Atrophic gastritis occurred in 19 of 19 (100%) patients, with hypergastrinemia in 25 (76%) of 33 patients tested. Antral endoscopic appearances included raised or flat stripes of ectatic vascular tissue (89%) or diffusely scattered lesions (11%). Proximal gastric involvement was present in 12 patients (27%), typically in the presence of a diaphragmatic hernia. Endoscopic laser therapy after a median of one treatment (range of 1-4) resulted in complete resolution of visible disease in four patients (13%) and resolution of > 90% in 24 patients (80%). Hemoglobin levels normalized in 87% of patients over a median follow-up period of 2 years (range of 1 month to 6 years) with no major complications. Blood transfusions were not necessary after laser therapy in 86% of 28 initially transfusion-dependent patients. The characteristic clinical, laboratory, and endoscopic features allow for a confident diagnosis that can lead to successful endoscopic treatment.

Over the past decade, awareness of the association between portal hypertension and changes in the intestinal circulation has increased. Most of the observations have been made by endoscopic examination and biopsy of the mucosa. The fundamental pathologic change is a vasculopathy. Portal hypertensive intestinal vasculopathy (PHIV) most often involves the stomach (gastropathy) and can be a common source of bleeding. The significance of small bowel involvement (enteropathy) is unknown. Colon involvement (colopathy) has been associated with bleeding, and mimics inflammatory bowel disease. The reliability of endoscopic appearances and histologic examination in establishing the diagnosis is questionable. Recent observations of other diagnostic modalities and associated physiologic alterations and treatment options are discussed. Further prospective evaluations that use uniform terminology for endoscopic and histologic descriptions are needed to establish criteria for accurate diagnosis and assessment of response to treatment.

The initial experience of a specialized management team organized to provide expedient care for all acute major gastrointestinal bleeding in protocolized fashion at a large referral center is presented. Of the 417 patients, 56% developed bleeding while hospitalized. Upper gastrointestinal bleeding accounted for 82%. The five most common etiologies included gastric ulcers (83 patients), duodenal ulcers (67 patients), erosions (41 patients), varices (35 patients), and diverticulosis (29 patients). Nonsteroidal anti-inflammatory drugs were implicated in 53% of gastroduodenal ulcers. The incidence of nonbleeding visible vessels was 42% in gastric and 54% in duodenal ulcers. The rates of rebleeding were 24% (20 patients) in gastric ulcers and 28% (19 patients) in duodenal ulcers. Predictive factors for rebleeding included copious bright red blood, active arterial streaming, spurting, or a densely adherent clot. The rebleeding rate for esophagogastric varices was 57%. The mortality rate overall was 6% (27 patients), with rates varying from 3% (five patients) for gastroduodenal ulcers to 40% (14 patients) for esophagogastric varices. The morbidity rate for the entire patient population was 18% (77 patients), dominated by myocardial events (34 patients). The average length of hospitalization for gastroduodenal ulcers was 5 days, for diverticulosis 8 days, and for varices 10 days. The major efforts of a specialized Gastrointestinal Bleeding Team would be best directed at both reducing the morbidity associated with acute bleeding and reducing the overall cost of care.

To determine whether the natural history of strictures is affected by the type of dilator used to treat newly diagnosed peptic strictures, we designed a prospective randomized trial to compare the results after Eder-Puestow or Medi-Tech balloon dilation. We entered 31 patients into the trial. We also prospectively followed up all 92 nonrandomized patients who underwent their first dilation for a benign stricture during the same period as the prospective randomized trial. The nonrandomized patients also underwent dilation with either the Eder-Puestow or the balloon technique at the discretion of the gastroenterologist performing the endoscopy. We found no statistically significant differences in the immediate or long-term results of the two methods among the randomized, nonrandomized, and overall combined groups. All but 1 of the 123 patients had immediate relief of dysphagia. Within each group of patients, the probability of remaining free of dysphagia 1 year after the initial dilation was approximately 20%, and the probability of not requiring a second dilation was approximately 65% with either technique. Major (esophageal rupture) and minor (bleeding or chest pain) complications occurred in 1% and 5% of the patients and 0.4% and 3% of the total dilation procedures, respectively. The esophageal rupture and four of six minor complications occurred after repeated dilations. Five of the six minor complications occurred with use of the Eder-Puestow dilators. We conclude that Eder-Puestow and balloon dilations of benign esophageal strictures are associated with similar outcomes, but repeated dilations and the Eder-Puestow technique may be associated with an increased risk of complications.

Ninety-three consecutive patients with transfusion-dependent gastrointestinal bleeding from vascular malformations (VMs) underwent systematic assessment in our gastrointestinal laser suite with extended upper gastrointestinal endoscopy and colonoscopy. Of these patients, 83 had angiodysplasia and 10 had the Osler-Weber-Rendu (OWR) syndrome. The median age in each of these groups was 70 and 63 years, respectively. Cardiovascular disease, especially valvular disease, was common. A poor correlation existed between the results of endoscopically identified VMs and visceral angiography in patients with angiodysplasia. A combination of upper and lower gastrointestinal VMs was found in 11% of patients with angiodysplasia and 60% of those with the OWR syndrome. All identified VMs were completely obliterated by photocoagulation with use of a neodymium:yttrium-aluminum-garnet (Nd:YAG) laser. Bleeding was successfully controlled in 9 patients with the OWR syndrome and in 72 patients with angiodysplasia (range of follow-up, 1 to 39 months). In 243 laser treatments, 3 perforations and 5 episodes of delayed bleeding occurred. This experience demonstrates that extended upper endoscopy is useful in identifying VMs and that gastrointestinal bleeding from VMs can be safely and successfully controlled with use of endoscopic Nd:YAG laser therapy.

Twenty patients with dysphagia due to inoperable esophageal cancer were randomized to receive either contact or noncontact endoscopic laser treatment. Treatment groups were similar with respect to age, dysphagia score, and tumor dimensions. The median number of initial treatment sessions was two in both groups, and the median treatment times per session were 23 min (range, 12 to 55 min) in the contact group and 19 min (range, 5 to 28 min) in the noncontact group. Median dysphagia scores were also similar in both groups 1 month after laser treatment, and no difference was apparent in the duration of palliation. There were no patient complications attributable to laser therapy, but damage to the laser wave guide occurred in three contact sessions and two noncontact sessions. These data suggest no advantage for the contact method of endoscopic Nd:YAG laser palliation of esophageal carcinoma with respect to number of treatment sessions, relief of dysphagia, or occurrence of complications.

Our first year's experience with endoscopic variceal sclerosis (EVS) performed with a cuffed balloon fiberoptic endoscope is presented. Seventy-five patients have been treated with EVS without requiring the use of general anesthesia. All but one patient had endoscopically documented variceal hemorrhage and underwent EVS while bleeding or shortly thereafter. Ninety-two per cent of the patients were discharged from the hospital after initial treatment with the current overall survival rate being 89.3%. Complications resulting in a prolonged hospitalization were infrequent, but two deaths occurred in which EVS complications may have been a contributing factor. Based on these results, EVS is recommended for managing variceal hemorrhage and is a reasonable alternative for shunt surgery in the management of variceal bleeding.

Esophageal variceal sclerotherapy has been enthusiastically accepted as the procedure of choice for patients with variceal hemorrhage. Because the relationships among liver function, different causes of varices, survival, and rebleeding rates have not been well established in sclerotherapy trials, this enthusiasm may be unjustified. We studied these relationships in 80 patients with bleeding esophageal varices who were admitted to hospitals affiliated with our clinic between 1978 and 1980 and who did not receive sclerotherapy and in 162 patients admitted between 1980 and 1982 who received sclerotherapy with ethanolamine oleate. In both groups of patients, survival and bleeding-free intervals were significantly related (P less than 0.005 and P less than 0.01, respectively) to hepatic reserve (Child's class). In addition, patients with nonalcohol-related liver disease and poor hepatic reserve (Child's class C) had reduced survival and bleeding-free intervals compared with patients in class C with alcohol-related liver disease. Similar probabilities of survival and bleeding-free intervals were noted for Child's class subgroups and etiologic subgroups in the sclerotherapy and nonsclerotherapy groups, although a formal comparison was not made because of the retrospective nature of this study. Indications that sclerotherapy increases survival and reduces rebleeding may be due to different distributions of Child's classes and causes of varices within sclerotherapy and nonsclerotherapy groups in published control trials.

Thirteen patients (9 women, 4 men) with anemia from acute and chronic gastrointestinal bleeding were found to have antral vascular disease consistent with watermelon stomach. The median age was 73 yr, with a range of 54-88 yr. Eight of the patients were transfusion-dependent, requiring a median of 5.5 U within the 12 mo before treatment. All were treated with endoscopic neodymium:yttrium-aluminum-garnet laser coagulation. Endoscopic and hematologic improvement were evident in 12 patients available for follow-up after a median period of 6 mo. There was a median increase of 4 g/dl in hemoglobin concentration; thus, the need for transfusion was eliminated. No major complications were encountered. Laser coagulation for watermelon stomach appears to be safe and efficacious and may be a therapeutic alternative for this disorder.

Four patients with chronic hematochezia and transfusion-dependent anemia from postradiation rectal vascular lesions were successfully managed by endoscopic laser coagulation. In all four patients, symptomatic, hematologic, and endoscopic improvement was evident. Laser therapy for severe radiation-induced rectal bleeding seems to be safe and efficacious and should be considered before surgical intervention.

Nonalcoholic steatohepatitis is a poorly understood and hitherto unnamed liver disease that histologically mimics alcoholic hepatitis and that also may progress to cirrhosis. Described here are findings in 20 patients with nonalcoholic steatohepatitis of unknown cause. The biopsy specimens were characterized by the presence of striking fatty changes with evidence of lobular hepatitis, focal necroses with mixed inflammatory infiltrates, and, in most instances, Mallory bodies; Evidence of fibrosis was found in most specimens, and cirrhosis was diagnosed in biopsy tissue from three patients. The disease was more common in women. Most patients were moderately obese, and many had obesity-associated diseases, such as diabetes mellitus and cholelithiasis. Presence of hepatomegaly and mild abnormalities of liver function were common clinical findings. Currently, we know of no effective therapy.

We prospectively studied the short-term and long-term efficacy and safety of endoscopic laser treatment in 25 patients with dysphagia from advanced esophageal cancer. Malignant stenoses were recanalized in all patients, and the ability to swallow was improved in about 80%. Results were best in patients with adenocarcinomas and in those who reported a good appetite. A single laser treatment provided adequate palliation in more than half the patients until the time of death. In those patients in whom stenosis recurred, re-treatment was necessary a median of 3.2 months after the initial laser treatment. No laser-related mortality or major morbidity occurred. We conclude that endoscopic laser therapy seems to be a feasible method of palliating malignant dysphagia.