24 results on '"Matthew R. Dixon"'
Search Results
2. Viral and Fungal Infectious Colitides
- Author
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Matthew R. Dixon
- Subjects
business.industry ,High mortality ,Gastroenterology ,Congenital cytomegalovirus infection ,medicine.disease ,Bioinformatics ,Article ,Histoplasmosis ,Immune system ,Acquired immunodeficiency syndrome (AIDS) ,medicine ,Surgery ,Colitis ,business - Abstract
Viral and fungal colitides are rare in the immunocompetent host but are most clinically significant in populations with compromised immune function. They may be associated with high mortality, particularly when treatment is delayed. It is important to be aware of these diseases when treating patients with colitis to allow early diagnosis and treatment, which will improve outcome.
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- 2007
- Full Text
- View/download PDF
3. Contemporary Indications for and Early Outcomes of Abdominoperineal Resection
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Hernan I. Vargas, Zuri Murrell, Michael J. Stamos, Matthew R. Dixon, Ravin R. Kumar, and Tracey D. Arnell
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medicine.medical_specialty ,Ileus ,Urinary retention ,Colorectal cancer ,Abdominoperineal resection ,business.industry ,medicine.medical_treatment ,Cancer ,Retrospective cohort study ,General Medicine ,medicine.disease ,Surgery ,medicine ,medicine.symptom ,business ,Anal Melanoma ,Colectomy - Abstract
The purpose of this study was to review and characterize the indications and early outcomes of abdominoperineal resection (APR) when used in a colorectal practice in an academic setting. Data was collected from the charts of all patients undergoing APR in a retrospective manner. Data collected included demographic information and details regarding the clinical presentation. Operative factors, information regarding the postoperative course, and morbidity and mortality were evaluated. Forty-four patients were treated with an APR in this practice between the years 1992 and 2004. The indications for operation were primary rectal cancer (n = 31), recurrent rectal cancer (n = 6), intractable Crohn disease (n = 3), anal melanoma (n = 1), cloacogenic cancer (n = 1), squamous cell cancer (n = 1), and gastrointestinal stromal tumor (n = 1). Complications in the first 60 days affected 14 patients (32%). The most common complication was intra-abdominal/pelvic abscess formation occurring in 6 of these 14 patients (43%). Additional complications in the first 60 days included rectus flap necrosis, perineal wound evisceration, prolonged ileus, and urinary retention. There was no surgical mortality. Long-term complications occurred in 7 patients (16%), with parastomal hernia being the most common (43%). Although relatively infrequently used, APR will continue to play a role for selected patients in the future. Despite the significant morbidity associated with this surgery, APR may provide beneficial treatment for select cases of low rectal cancer, end-stage inflammatory bowel disease, and anal malignancies.
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- 2005
- Full Text
- View/download PDF
4. Colonic Histoplasmosis Presenting as Colon Cancer in the Nonimmunocotnpromised Patient: Report of a Case and Review of the Literature
- Author
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Jason T. Lee, Matthew R. Dixon, Zuri Murrell, Viken Konyalian, Rodolfo Agbunag, Sassan Rostami, Samuel French, and Ravin R. Kumar
- Subjects
General Medicine - Abstract
Histoplasma capsulatum is an important pathogen that is the most commonly diagnosed endemic mycosis in the gastrointestinal tract of immunocompromised hosts. Failure to recognize and treat disseminated histoplasmosis in AIDS patients invariably leads to death. Gastrointestinal manifestations frequently involve the terminal ileum and cecum, and depending on the layer of bowel wall involved present as bleeding, obstruction, perforation, or peritonitis. Because they can be variable in appearance, they may be mistaken for Crohn's disease or malignant tumors. Four distinct pathologic patterns of GI histoplasmosis have been described that all have differing clinical presentations. We report a case of a non-AIDS patient who presented with a near-obstructing colonic mass suspicious for advanced malignancy but was found to have histoplasmosis on final pathology. The patient underwent successful operative resection, systemic antifungal therapy, and extensive workup for immunosuppressive disorders, which were negative. The patient was from an area in Mexico known to be endemic for histoplasmosis. This is the first report of a colonic mass lesion occurring in a non-AIDS patient, and review of the worldwide literature regarding GI histoplasmosis reveals excellent long-term survival with aggressive therapy. We discuss the surgical and medical management of colonic histoplasmosis in this report.
- Published
- 2004
- Full Text
- View/download PDF
5. Diverticulitis: Truly Minimally Invasive Management
- Author
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Luis H. Macias, Jason S. Haukoos, Matthew R. Dixon, Ehab Sorial, Tracey D. Arnell, Michael J. St Amos, and Ravin R. Kumar
- Subjects
General Medicine - Abstract
The purpose of this study is to evaluate the treatment of patients with acute diverticulitis in the inpatient setting using minimal intervention. This was a retrospective study of 75 patients admitted over a 3-year period with acute diverticulitis as evidenced by computed tomography (CT) and clinical scenario. Of the patients enrolled, 24 (32%) had abscesses identified on their initial CT scan. An additional four patients had abscesses noted on a subsequent CT scan obtained because of lack of complete improvement with medical management, thus raising the total number of abscesses to 28 (37%). Of the patients with abscesses, 10 (36%) underwent drainage using a CT-guided percutaneous or ultrasound-guided transrectal approach an average of 6 days after admission. Of the 75 patients, five (7%) required operative intervention during the initial hospitalization for failure of medical management, two (40%) of whom had abscesses on presentation. The overall median length of hospitalization was 5 (interquartile range [IQR] 4–9) days, and 18 patients (24%) had recurrences during the study period. Our conservative approach to percutaneous and surgical intervention resulted in relatively low percutaneous drainage, a low operative rate, and a reasonable length of hospitalization and recurrence rate.
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- 2004
- Full Text
- View/download PDF
6. Contents Vol. 21, 2004
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Anders Thune, Lars Lundell, Albert Pey, Henrik Bergquist, Tertuliano Aires-Neto, Ana García-Agustí, Masao Hamuro, E. García-Granero, King-Teh Lee, Shungo Endo, Shoji Kubo, Y. Munz, Eryvaldo Sócrates Tabosa do Egito, Leif Nelvin, J. García-Armengol, J. Buckels, Magnus Ruth, H.W. Tilanus, Andreas Meyer, S.A. García-Botello, D. Menzies, R. Aggarwal, Wen-Tseng Chang, C. Juan, Antonio María Lacy, Hikaru Fujioka, Junzo Yamaguchi, B. Lamme, S. Lledó, M.A. Boermeester, Hasse Ejnell, Meng-Chuan Huang, Takashi Kanematsu, D. Stell, H.J.M. Oostvogel, Yasuhiro Torashima, R. de Vos, Kenji Kaneda, Salvador Morales, H.G. Gooszen, L.M.A. Akkermans, Tamio Kushihashi, H. Obertop, Yuichi Inoue, Dione Maria Valença, Kenji Nakamura, Koichi Nagata, Marek Poźniczek, Anne Blomqvist, Ingemar Fogdestam, W.E. Hueting, R.A. de Man, Moshe Hashmonai, Kunihide Izawa, O. van Ruler, Piotr Budzyński, Julio Sérgio Marchini, F. López-Mozos, A. Darzi, M.J.C. Eijkemans, Kazuhiro Hirohashi, M.C. Parker, José Luis Salvador, Matthias Behrend, Wojciech Kostarczyk, Shin-ei Kudo, Mikael Johansson, Claes Mercke, C.J.H.M. van Laarhoven, Andrzej Bobrzyński, Antonio Torres, J.W.O. van Till, C. Verhoef, Ken Taniguchi, Enrique Veloso, K. Moorthy, Angel Carrillo, Eduardo María Targarona, Hans Mark, Jerzy Krzywoń, D. Mayer, S. Undre, A. Espí, J. Hance, Xavier Feliu, Herng-Chia Chiu, Michael J. Stamos, Aldo Cunha Medeiros, Takashi Kitanosono, T. Rockall, Takatsugu Yamamoto, M.E.I. Schipper, J.N.M. IJzermans, Shigefumi Suehiro, José Brandão-Neto, Matthew R. Dixon, P.E. Zondervan, Andrzej Wysocki, Katsu Sakabe, T.J.M.V. van Vroonhoven, and D. Mirza
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Traditional medicine ,business.industry ,Gastroenterology ,Medicine ,Surgery ,business - Published
- 2004
- Full Text
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7. Stapled Hemorrhoidectomy: A Review of Our Early Experience
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Matthew R. Dixon, Michael J. Stamos, Stuart R. Grant, Ravin R. Kumar, Clifford Y. Ko, Russell A. Williams, and Tracey D. Arnell
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General Medicine - Abstract
Treatment of hemorrhoids may safely be accomplished by using a circular stapler instead of the conventional open procedure for large symptomatic hemorrhoids. Our purpose was to assess the safety and early post-op results of this new surgical technique as it was introduced into clinical practice. Medical records from 62 patients treated by circumferential mucosectomy/stapled hemorrhoidectomy were obtained from 6 surgeons. Preoperative factors assessed included demographics, comorbidities, prior anorectal surgery, hemorrhoid grade, and the indications for surgery. Operative factors examined included operating time, use of perioperative antibiotics, and oversewing of the suture line. Postoperative factors included complications and date of last follow-up. Sixty-two patients underwent this operation, and complications were reported in six patients (10%). There was one death unrelated to the hemorrhoid surgery. Postoperative pain, defined as requiring pain control with intravenous medication, hospital admission, or an emergency department visit, occurred in two patients. Two patients reported postoperative bleeding. One patient experienced bleeding the first evening, and the second patient had bleeding 1 week postoperatively. The first patient was admitted overnight and required no blood transfusion or further intervention. The second patient was subsequently found to have a bleeding diverticulum. One patient experienced urinary retention that resolved with conservative management. Postoperative follow-up was available for over 90 per cent of the patients at a median of 4 weeks postoperatively. No additional complications were discovered at follow-up. This data suggests that stapled hemorrhoidectomy is a safe and effective approach to hemorrhoidal disease. Our findings indicate an acceptable complication rate among a group of surgeons beginning to integrate this modality into clinical practice.
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- 2003
- Full Text
- View/download PDF
8. Implementation of an electronic surveillance database for patients with colorectal cancer
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Olakunle Ajayi, Matthew R. Dixon, Michael Rizzo, Yan Li, and Pamela Kim Washington
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Cancer Research ,Database ,medicine.diagnostic_test ,Colorectal cancer ,Electronic surveillance ,business.industry ,Colonoscopy ,Information repository ,medicine.disease ,computer.software_genre ,Workflow ,Oncology ,medicine ,Physician assistants ,business ,computer ,Alert system ,Cancer staging - Abstract
231 Background: An electronic surveillance database was created to monitor patients for five years following curative treatment for colorectal cancer. The database serves as an alert system and data repository for imaging, serology, and colonoscopy surveillance tests preloaded for each patient in accordance with NCCN guidelines based upon TNM cancer staging. Methods: The chiefs of Surgery and Oncology defined end-user specifications for the Filemaker Pro database. Key features include preloaded tests based upon NCCN guidelines, expected date of completion, and exam results. The database also tracks tests overdue or ordered but not yet obtained. A new workflow consisting of a monthly report of new colorectal cases from Pathology and a meeting of surgical and oncology physicians and physician assistants to review the report, update the database with new patients, and identify patients due for follow-up was established. Results: 250 cases are currently being monitored. By 2019, the database is poised to be the largest in Kaiser Permanente (KP) dedicated to active surveillance following colorectal cancer treatment. Conclusions: In addition to ensuring that individual patients obtain surveillance tests at the intervals based upon national guidelines for each TNM classification, the database can also be used to assess surveillance results and recurrence rates. The database format has also proven invaluable for other services. The Thoracic service recently created a database modeled after colorectal surveillance to begin tracking lung cancer patients. Beginning in 2016, the colorectal database became a Regional KP initiative and will be incorporated into HealthConnect (electronic medical record).
- Published
- 2017
- Full Text
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9. Unipedal stance testing as an indicator of fall risk among older outpatients
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Robert A. Werner, Anne M. Ruhl, Matthew R. Dixon, Edward A. Hurvitz, and James K. Richardson
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Male ,medicine.medical_specialty ,Physical Therapy, Sports Therapy and Rehabilitation ,Physical examination ,Electromyography ,Tertiary care ,Weight-Bearing ,Risk Factors ,Humans ,Medicine ,Risk factor ,Radiculopathy ,Postural Balance ,Aged ,medicine.diagnostic_test ,business.industry ,Rehabilitation ,Peripheral Nervous System Diseases ,Fall risk ,Middle Aged ,Test (assessment) ,Ambulatory ,Physical therapy ,Accidental Falls ,Female ,business ,Stance time - Abstract
To test the hypothesis that a decreased unipedal stance time (UST) is associated with a history of falling among older persons.Fifty-three subjects underwent a standardized history and physical examination and three trials of timed unipedal stance.The electroneuromyography laboratories of tertiary care Veterans Administration and university hospitals.Ambulatory outpatients 50 years and older referred for electrodiagnostic studies.UST and fall histories during the previous year.Twenty subjects (38%) reported falling. Compared with the subjects who had not fallen, those who fell had a significantly shorter UST (9.6 [SD 11.6] vs 31.3 [SD 16.3] seconds, using the longest of the three trials, p.00001). An abnormal UST (30sec) was associated with an increased risk of having fallen on univariate analysis and in a regression model (odds ratio 108; 95% confidence interval 3.8,100; p.007). The sensitivity of an abnormal UST in the regression model was 91% and the specificity 75%. When UST was considered age was not a predictor of a history of falls.UST of30sec in an older ambulatory outpatient population is associated with a history of falling, while a UST ofor = 30sec is associated with a low risk of falling.
- Published
- 2000
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10. Appendicitis
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Matthew R. Dixon and Michael J. Stamos
- Published
- 2010
- Full Text
- View/download PDF
11. Transanal endoscopic microsurgery versus conventional transanal excision for patients with early rectal cancer
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Robert D. Madoff, Dimitrios Christoforidis, Anders Mellgren, Hyeon Min Cho, Charles O. Finne, and Matthew R. Dixon
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Adult ,Male ,medicine.medical_specialty ,Microsurgery ,Rectum ,Anal Canal ,Adenocarcinoma ,medicine ,Rectal Adenocarcinoma ,Adjuvant therapy ,Humans ,Endoscopy, Digestive System ,Stage (cooking) ,Aged ,Retrospective Studies ,Transanal Excision ,Aged, 80 and over ,business.industry ,Rectal Neoplasms ,Patient Selection ,Anal canal ,Middle Aged ,Prognosis ,Survival Analysis ,Surgery ,medicine.anatomical_structure ,Resection margin ,T-stage ,Female ,Neoplasm Recurrence, Local ,business - Abstract
Objective: To compare transanal endoscopic microsurgery (TEMS) with conventional transanal excision (TAE) in terms of the quality of resection, local recurrence, and survival rates in patients with stage I rectal cancer. Background: Although TEMS is often considered a superior surgical technique to TAE, it is poorly suited for excising tumors in the lower third of the rectum. Such tumors may confer a worse prognosis. Methods: We retrospectively reviewed information on all patients with stage pT1 and pT2 rectal adenocarcinoma who underwent local excision from 1997 through mid-2006. We excluded patients with node-positive, metastatic, recurrent, previously irradiated, or snare-excised tumors. Results: Our study included 42 TEMS and 129 TAE patients. We found no significant differences in patient characteristics, adjuvant therapy, tumor stage, or adverse histopathologic features. In the TAE group, 52 (40%) of tumors were
- Published
- 2009
12. Appendicitis
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Matthew R. Dixon and Michael J. Stamos
- Published
- 2009
- Full Text
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13. Comparison with Traditional Techniques
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Matthew R. Dixon and Charles O. Finne
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Local excision ,medicine.medical_specialty ,business.industry ,Colorectal cancer ,Medicine ,Radiology ,business ,medicine.disease - Published
- 2008
- Full Text
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14. The role of primary tumour resection in patients with stage IV colorectal cancer
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Michael J. Stamos, R. Sinow, D. K. Rosing, S. Bhaheetharan, Jason S. Haukoos, Matthew R. Dixon, Viken Konyalian, and Ravin R. Kumar
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Adult ,Male ,medicine.medical_specialty ,Stage IV Colorectal Cancer ,Colorectal cancer ,Tumor resection ,Perforation (oil well) ,Disease ,Cohort Studies ,medicine ,Humans ,Endoscopic stenting ,Survival analysis ,Colectomy ,Aged ,Neoplasm Staging ,Proportional Hazards Models ,Retrospective Studies ,business.industry ,Liver Neoplasms ,Palliative Care ,Gastroenterology ,Middle Aged ,medicine.disease ,Survival Analysis ,Surgery ,Chemotherapy, Adjuvant ,Female ,Radiotherapy, Adjuvant ,Liver function ,business ,Colorectal Neoplasms - Abstract
Objective The management of stage IV colorectal cancer is controversial. Resection of the primary tumour to prevent obstruction, bleeding or perforation is the traditional approach, although survival benefit is undetermined. Management consisting of diverting ostomy, enteric bypass, laser recanalization or endoscopic stenting is an alternative to radical resection. The purpose of this study was to determine the role of resection of the primary tumour in patients with stage IV colorectal cancer, with specific attention paid to survival benefit and safety. Method This was a retrospective review of all stage IV colon and rectal cancer patients in our tumour registry between 1991 and 2002. Data collected included patient demographics, presenting symptoms, detail from the hospital course including diagnostic data and operative management, complications and survival time (days). Survival analysis was performed to assess the effect of primary tumour resection on long-term survival. Results 109 patients were studied. Sixty-two (57%) patients (group I) underwent resection of the primary tumour, whereas 47 (43%) patients (group II) were managed without resection. Median survival times for groups I and II were 375 (IQR: 179–759) and 138 (IQR: 35–262) days respectively (P
- Published
- 2007
15. Contemporary indications for and early outcomes of abdominoperineal resection
- Author
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Zuri A, Murrell, Matthew R, Dixon, Hernan, Vargas, Tracey D, Arnell, Ravin, Kumar, and Michael J, Stamos
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Male ,Postoperative Complications ,Treatment Outcome ,Crohn Disease ,Rectal Neoplasms ,Humans ,Female ,Middle Aged ,Colectomy ,Retrospective Studies - Abstract
The purpose of this study was to review and characterize the indications and early outcomes of abdominoperineal resection (APR) when used in a colorectal practice in an academic setting. Data was collected from the charts of all patients undergoing APR in a retrospective manner. Data collected included demographic information and details regarding the clinical presentation. Operative factors, information regarding the postoperative course, and morbidity and mortality were evaluated. Forty-four patients were treated with an APR in this practice between the years 1992 and 2004. The indications for operation were primary rectal cancer (n = 31), recurrent rectal cancer (n = 6), intractable Crohn disease (n = 3), anal melanoma (n = 1), cloacogenic cancer (n = 1), squamous cell cancer (n = 1), and gastrointestinal stromal tumor (n = 1). Complications in the first 60 days affected 14 patients (32%). The most common complication was intra-abdominal/pelvic abscess formation occurring in 6 of these 14 patients (43%). Additional complications in the first 60 days included rectus flap necrosis, perineal wound evisceration, prolonged ileus, and urinary retention. There was no surgical mortality. Long-term complications occurred in 7 patients (16%), with parastomal hernia being the most common (43%). Although relatively infrequently used, APR will continue to play a role for selected patients in the future. Despite the significant morbidity associated with this surgery, APR may provide beneficial treatment for select cases of low rectal cancer, end-stage inflammatory bowel disease, and anal malignancies.
- Published
- 2006
16. Factors affecting the successful management of intra-abdominal abscesses with antibiotics and the need for percutaneous drainage
- Author
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Ravin R. Kumar, Justin Kim, Luis H. Macias, Jason S. Haukoos, Michael J. Stamos, Viken Konyalian, and Matthew R. Dixon
- Subjects
Adult ,Male ,medicine.medical_specialty ,Percutaneous ,Abdominal Abscess ,Radiography, Interventional ,Cohort Studies ,medicine ,Humans ,Abscess ,Ultrasonography, Interventional ,Retrospective Studies ,business.industry ,Gastroenterology ,Retrospective cohort study ,General Medicine ,Diverticulitis ,Middle Aged ,medicine.disease ,Antibiotic coverage ,Appendicitis ,Colorectal surgery ,Confidence interval ,Surgery ,Anti-Bacterial Agents ,Treatment Outcome ,Drainage ,Female ,business ,Tomography, X-Ray Computed - Abstract
There is no definite consensus on the management of intra-abdominal abscesses in adults. This retrospective study evaluated the use of antibiotic therapy and percutaneous image-guided drainage in adult patients with intra-abdominal abscesses.A retrospective chart review of 114 patients with intra-abdominal abscesses was conducted. Data collected included patient demographics, presenting symptoms, radiographic interpretation, vital signs, antibiotic coverage, laboratory values, and details of the hospital course. Bivariate statistical tests were performed using the Wilcoxon rank-sum test, chi-squared test, or Fisher's exact test, where appropriate.Sixty-seven of 114 patients (59 percent) had intra-abdominal abscesses resulting from appendicitis, diverticulitis in 30 patients (26 percent), postoperative in 13 patients (11 percent), and undetermined in 4 patients (4 percent). Three patients (3 percent; 95 percent confidence interval, 1-8 percent) failed conservative management and underwent urgent operation. Sixty-one (54 percent; 95 percent confidence interval, 44-63 percent) patients improved with intravenous antibiotic therapy alone. Fifty patients (44 percent; 95 percent confidence interval, 35-54 percent) underwent image-guided percutaneous drainage after 48 to 72 hours of antibiotic therapy. Patients who improved on antibiotics alone had average abscess diameter of 4 cm, whereas patients who underwent percutaneous drainage had average diameter of 6.5 cm (P0.0001). Maximal temperature at time of admission was 100.8 degrees F for antibiotic group and 101.2 degrees F for percutaneous drainage group (P=0.0067).The majority of the patients with intra-abdominal abscesses improved with antibiotic therapy alone. Those patients with an abscess diameter6.5 cm and temperature at admission101.2 degrees F have higher likelihood of failing conservative therapy with antibiotics alone and requiring percutaneous drainage.
- Published
- 2005
17. Colonic histoplasmosis presenting as colon cancer in the nonimmunocompromised patient: report of a case and review of the literature
- Author
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Jason T, Lee, Matthew R, Dixon, Zuri, Murrell, Viken, Konyalian, Rodolfo, Agbunag, Sassan, Rostami, Samuel, French, and Ravin R, Kumar
- Subjects
Colonic Diseases ,Colonic Neoplasms ,Histoplasma ,Humans ,Female ,Cecal Neoplasms ,Comorbidity ,Adenocarcinoma ,Middle Aged ,Histoplasmosis ,Immunocompetence - Abstract
Histoplasma capsulatum is an important pathogen that is the most commonly diagnosed endemic mycosis in the gastrointestinal tract of immunocompromised hosts. Failure to recognize and treat disseminated histoplasmosis in AIDS patients invariably leads to death. Gastrointestinal manifestations frequently involve the terminal ileum and cecum, and depending on the layer of bowel wall involved present as bleeding, obstruction, perforation, or peritonitis. Because they can be variable in appearance, they may be mistaken for Crohn's disease or malignant tumors. Four distinct pathologic patterns of GI histoplasmosis have been described that all have differing clinical presentations. We report a case of a non-AIDS patient who presented with a near-obstructing colonic mass suspicious for advanced malignancy but was found to have histoplasmosis on final pathology. The patient underwent successful operative resection, systemic anti-fungal therapy, and extensive workup for immunosuppressive disorders, which were negative. The patient was from an area in Mexico known to be endemic for histoplasmosis. This is the first report of a colonic mass lesion occurring in a non-AIDS patient, and review of the worldwide literature regarding GI histoplasmosis reveals excellent long-term survival with aggressive therapy. We discuss the surgical and medical management of colonic histoplasmosis in this report.
- Published
- 2004
18. Diverticulitis: truly minimally invasive management
- Author
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Luis H, Macias, Jason S, Haukoos, Matthew R, Dixon, Ehab, Sorial, Tracey D, Arnell, Michael J, Stamos, and Ravin R, Kumar
- Subjects
Adult ,Hospitalization ,Male ,Abdominal Abscess ,Surgical Procedures, Operative ,Acute Disease ,Drainage ,Humans ,Female ,Middle Aged ,Tomography, X-Ray Computed ,Diverticulitis ,Retrospective Studies - Abstract
The purpose of this study is to evaluate the treatment of patients with acute diverticulitis in the inpatient setting using minimal intervention. This was a retrospective study of 75 patients admitted over a 3-year period with acute diverticulitis as evidenced by computed tomography (CT) and clinical scenario. Of the patients enrolled, 24 (32%) had abscesses identified on their initial CT scan. An additional four patients had abscesses noted on a subsequent CT scan obtained because of lack of complete improvement with medical management, thus raising the total number of abscesses to 28 (37%). Of the patients with abscesses, 10 (36%) underwent drainage using a CT-guided percutaneous or ultrasound-guided transrectal approach an average of 6 days after admission. Of the 75 patients, five (7%) required operative intervention during the initial hospitalization for failure of medical management, two (40%) of whom had abscesses on presentation. The overall median length of hospitalization was 5 (interquartile range [IQR] 4-9) days, and 18 patients (24%) had recurrences during the study period. Our conservative approach to percutaneous and surgical intervention resulted in relatively low percutaneous drainage, a low operative rate, and a reasonable length of hospitalization and recurrence rate.
- Published
- 2004
19. Strategies for palliative care in advanced colorectal cancer
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Matthew R. Dixon and Michael J. Stamos
- Subjects
medicine.medical_specialty ,Antimetabolites, Antineoplastic ,Palliative care ,Colorectal cancer ,medicine.medical_treatment ,MEDLINE ,behavioral disciplines and activities ,Resection ,Advanced colorectal cancer ,Laser therapy ,Medicine ,Combined Modality Therapy ,Humans ,Neoadjuvant therapy ,business.industry ,General surgery ,Palliative Care ,Gastroenterology ,Radiotherapy Dosage ,medicine.disease ,Neoadjuvant Therapy ,Treatment Outcome ,Surgery ,Laparoscopy ,Fluorouracil ,Laser Therapy ,business ,Colorectal Neoplasms - Abstract
Palliative care has appropriately been receiving increased attention in recent years. From the surgeon’s standpoint, therapy is considered palliative when resection of all known tumor sites is no longer possible or advisable. Since a cure, as commonly defined, is not possible, the goal of treatment and eventually the success of therapy becomes judged by the control of symptoms and alleviation of suffering. Providing optimal palliative care for the patient with advanced colorectal cancer is a complex and challenging process. The process of providing palliative care may be a departure from the traditional surgical satisfaction derived from the complete excision of a malignancy, but surgeons achieving excellence in palliative care will likely find this a rewarding endeavor.
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- 2004
20. An assessment of the severity of recurrent appendicitis
- Author
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Tracey D. Arnell, Matthew R. Dixon, Ravin R. Kumar, Ina U Park, David Oliak, Jason S. Haukoos, and Michael J. Stamos
- Subjects
Adult ,Male ,medicine.medical_specialty ,Severity of Illness Index ,Interquartile range ,Recurrence ,medicine ,Appendectomy ,Humans ,Nonoperative management ,Infusions, Intravenous ,Interval appendectomy ,Retrospective Studies ,Perforated Appendicitis ,business.industry ,Clinical course ,General Medicine ,Middle Aged ,medicine.disease ,Appendicitis ,Surgery ,Anti-Bacterial Agents ,Recurrent appendicitis ,Female ,Complication ,business - Abstract
Background This study examines the clinical characteristics of patients who developed recurrent appendicitis after previous nonoperative management of perforated appendicitis. Methods Retrospective chart review was performed, and data from the recurrent and initial episode of appendicitis were collected. Results In all, 237 patients from 1989 to 2001 were managed nonoperatively for perforated appendicitis and 32 (14%) were readmitted for recurrent appendicitis. Median white blood cell count at recurrence was 9.5 (interquartile range [IQR]: 6.6 to 13.2] versus 13.1 [IQR: 10.8 to 16.1] at initial presentation (P = 0.002). Maximum temperature was 98.6°F [IQR: 98.2 to 100.5] at recurrence versus 100.3°F [IQR: 99.5 to 101.5] (P = 0.008). Median time for intravenous antibiotics use was 3 [IQR: 3 to 7] days at recurrence versus 6 [IQR: 4 to 8] days initially (P = 0.01). Inpatient stay was also shorter; median length was 6 [IQR: 3 to 8] days compared with 7 [IQR: 5 to 9] days at initial presentation (P = 0.02). Conclusions Patients managed nonoperatively for perforated appendicitis who later developed recurrent appendicitis exhibited a milder clinical course at recurrence. Elective interval appendectomy may be reserved until a recurrent episode.
- Published
- 2003
21. Stapled hemorrhoidectomy: a review of our early experience
- Author
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Matthew R, Dixon, Michael J, Stamos, Stuart R, Grant, Ravin R, Kumar, Clifford Y, Ko, Russell A, Williams, and Tracey D, Arnell
- Subjects
Male ,Pain, Postoperative ,Surgical Staplers ,Time Factors ,Surgical Stapling ,Humans ,Female ,Antibiotic Prophylaxis ,Postoperative Hemorrhage ,Hemorrhoids ,Follow-Up Studies - Abstract
Treatment of hemorrhoids may safely be accomplished by using a circular stapler instead of the conventional open procedure for large symptomatic hemorrhoids. Our purpose was to assess the safety and early post-op results of this new surgical technique as it was introduced into clinical practice. Medical records from 62 patients treated by circumferential mucosectomy/stapled hemorrhoidectomy were obtained from 6 surgeons. Preoperative factors assessed included demographics, comorbidities, prior anorectal surgery, hemorrhoid grade, and the indications for surgery. Operative factors examined included operating time, use of perioperative antibiotics, and oversewing of the suture line. Postoperative factors included complications and date of last follow-up. Sixty-two patients underwent this operation, and complications were reported in six patients (10%). There was one death unrelated to the hemorrhoid surgery. Postoperative pain, defined as requiring pain control with intravenous medication, hospital admission, or an emergency department visit, occurred in two patients. Two patients reported postoperative bleeding. One patient experienced bleeding the first evening, and the second patient had bleeding 1 week postoperatively. The first patient was admitted overnight and required no blood transfusion or further intervention. The second patient was subsequently found to have a bleeding diverticulum. One patient experienced urinary retention that resolved with conservative management. Postoperative follow-up was available for over 90 per cent of the patients at a median of 4 weeks postoperatively. No additional complications were discovered at follow-up. This data suggests that stapled hemorrhoidectomy is a safe and effective approach to hemorrhoidal disease. Our findings indicate an acceptable complication rate among a group of surgeons beginning to integrate this modality into clinical practice.
- Published
- 2003
22. Subject Index Vol. 21, 2004
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Takashi Kitanosono, T. Rockall, Andrzej Wysocki, Takatsugu Yamamoto, Katsu Sakabe, Yuichi Inoue, W.E. Hueting, Shungo Endo, Meng-Chuan Huang, Matthew R. Dixon, P.E. Zondervan, Takashi Kanematsu, J. Buckels, Piotr Budzyński, Kazuhiro Hirohashi, Y. Munz, M.J.C. Eijkemans, M.C. Parker, Dione Maria Valença, Wojciech Kostarczyk, José Luis Salvador, Antonio María Lacy, K. Moorthy, Angel Carrillo, Wen-Tseng Chang, Mikael Johansson, T.J.M.V. van Vroonhoven, M.A. Boermeester, F. López-Mozos, A. Darzi, R. de Vos, Magnus Ruth, Eduardo María Targarona, H.W. Tilanus, S. Lledó, J. Hance, Herng-Chia Chiu, Eryvaldo Sócrates Tabosa do Egito, Julio Sérgio Marchini, Koichi Nagata, R. Aggarwal, D. Mirza, C.J.H.M. van Laarhoven, Hasse Ejnell, J. García-Armengol, S.A. García-Botello, Tamio Kushihashi, Matthias Behrend, Xavier Feliu, E. García-Granero, R.A. de Man, Claes Mercke, Salvador Morales, H.J.M. Oostvogel, H. Obertop, Hans Mark, José Brandão-Neto, Albert Pey, Kenji Kaneda, Junzo Yamaguchi, Ana García-Agustí, Masao Hamuro, Anne Blomqvist, H.G. Gooszen, Ingemar Fogdestam, King-Teh Lee, L.M.A. Akkermans, C. Juan, Andrzej Bobrzyński, Marek Poźniczek, Shigefumi Suehiro, O. van Ruler, Leif Nelvin, B. Lamme, Shin-ei Kudo, Antonio Torres, J.W.O. van Till, Ken Taniguchi, S. Undre, M.E.I. Schipper, Kunihide Izawa, J.N.M. IJzermans, Moshe Hashmonai, Tertuliano Aires-Neto, Shoji Kubo, Anders Thune, Lars Lundell, Henrik Bergquist, Yasuhiro Torashima, Enrique Veloso, D. Mayer, Andreas Meyer, D. Menzies, Hikaru Fujioka, D. Stell, Kenji Nakamura, Michael J. Stamos, Aldo Cunha Medeiros, C. Verhoef, Jerzy Krzywoń, and A. Espí
- Subjects
Index (economics) ,business.industry ,Statistics ,Gastroenterology ,Medicine ,Surgery ,Subject (documents) ,business - Published
- 2004
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23. Prediction of survival in stage iv colorectal cancer by a computed tomographic scoring system for hepatic metastasis
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Matthew R. Dixon, Jason S. Haukoos, J.J. Naghi, S.M. Udani, Tracey D. Arnell, Michael J. Stamos, and R. Sinow
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medicine.medical_specialty ,Scoring system ,Stage IV Colorectal Cancer ,business.industry ,Colorectal cancer ,medicine.disease ,Gastroenterology ,Hepatic metastasis ,Computed tomographic ,Surgery ,Hepatic Involvement ,Internal medicine ,medicine ,Stage iv ,business ,Median survival - Abstract
To assess the relation between the burden of hepatic metastasis on initial CT scan and survival. A simple scoring system to quantify the degree of hepatic involvement was utilized by a single staff radiologist who retrospectively reviewed the CT scans obtained on admission of 48 patients who presented to the study institution with stage IV colon and rectal cancer between 1991 and 1998. The radiologist was blinded to the clinical presentation and survival of the patients. The scoring system separated patients into five groups depending on the radiologist’s visual calculation of the hepatic involvement by metastatic disease: 0% (stratum 1), 1–25% (stratum 2), 25–50% (stratum 3), 50–75% (stratum 4) and more than 75% (stratum 5). (Patients with 0% hepatic involvement had known metastatic disease at another site.) The results of this scoring system were then correlated with survival data. Kaplan-Meier curves demonstrated a statistically significant difference in survival between the different groups (p = 0.02). During the first four months after presentation, 91% (95% CI: 59%–100%) of patients in stratum 1 survived and 87% (95% CI: 60–98%) of patients in stratum 2 survived, while only 43% (95%:CI 10–82%), 40% (95% CI: 10–82%) and 22% (95% CI: 3–60%) of patients in Strata 3, 4 and 5 survived, respectively. Kruskal-Wallis testing also showed a significant difference across the five groups (p = 0.007). Strata 1 and 2, with lower hepatic tumor burdens, showed longer survival times with median survival of 312 days [IQR:143–739] and 293 days [IQR: 225–706]. As the amount of hepatic involvement increased, the median survival decreased with strata 3, 4, and 5 demonstrating a progressive decrease in survival time with median values of 100 days [IQR:38–375], 54 days [IQR:43–139] and 22 days [IQR:11–56], respectively. We have developed a simple anatomical CT-based scoring system which significantly correlates with survival of stage IV colorectal cancer patients. Most clinically important, a significant difference in survival was seen in the first few months after presentation. Assessing the volume of hepatic involvement is a useful adjunct to the clinician in providing optimal care to patients with advanced colon and rectal cancer.
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- 2003
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24. Carcinoembryonic Antigen and Albumin Predict Survival in Patients With Advanced Colon and Rectal Cancer
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Jason S. Haukoos, Matthew R. Dixon, Michael J. Stamos, Sejal M. Udani, Jesse J. Naghi, Ravin R. Kumar, and Tracey D. Arnell
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Adult ,Male ,medicine.medical_specialty ,Colorectal cancer ,Recursive partitioning ,Cohort Studies ,Carcinoembryonic antigen ,Interquartile range ,Blood plasma ,medicine ,Humans ,Serum Albumin ,Retrospective Studies ,Univariate analysis ,biology ,Rectal Neoplasms ,business.industry ,Albumin ,Retrospective cohort study ,Middle Aged ,Prognosis ,medicine.disease ,Survival Analysis ,Carcinoembryonic Antigen ,Surgery ,Colonic Neoplasms ,biology.protein ,Female ,business - Abstract
Hypothesis Patients with stage IV colon or rectal cancer at initial diagnosis have characteristics that will predict subsequent survival time. Design Retrospective cohort study. Setting Urban county teaching hospital providing tertiary care. Patients Patients who came to the study institution with stage IV colon or rectal cancer between 1991-1999. Main Outcome Measure Survival duration (days) after diagnosis. Results One hundred five patients were identified, with a median survival of 225 days (interquartile range, 72-688 days). Univariate analysis identified carcinoembryonic antigen (CEA) and albumin (ALB) as possible predictors for survival. Classification and regression tree analysis, a form of binary recursive partitioning, was used to identify optimal cut points for CEA (275 ng/mL) and ALB (2.7 g/dL) levels. Based on the cut points, patients were stratified into the following groups: (1) low CEA, high ALB; (2) low CEA, low ALB; (3) high CEA, high ALB; and (4) high CEA, low ALB. The median survival times for the first group and the fourth group were 287 days (interquartile range, 150-851 days) and 39 days (interquartile range, 14-168 days), respectively. A Kaplan-Meier analysis was performed, and a statistically significant difference was identified across all strata ( P = .004). Additionally, groups 1 and 4 demonstrated the largest overall survival difference ( P Conclusions Patients with stage IV colon and rectal cancer with a CEA level greater than or equal to 275 ng/mL and an ALB level less than 2.7g/dL had a significantly shorter survival time. Conversely, patients with an ALB level greater than or equal to 2.7 g/dL and a CEA level less than 275 ng/mL had a longer survival time.
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- 2003
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