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ObjectiveSurgical site infection (SSI) is a complication linked to increased costs and length of hospital stay. Prevention of SSI is important to reduce its burden on individual patients and the healthcare system. The authors aimed to assess the efficacy of preoperative chlorhexidine gluconate (CHG) showers on SSI rates following cranial surgery.MethodsIn November 2013, a preoperative CHG shower protocol was implemented at the authors' institution. A total of 3126 surgical procedures were analyzed, encompassing a time frame from April 2012 to April 2016. Cohorts before and after implementation of the CHG shower protocol were evaluated for differences in SSI rates.ResultsThe overall SSI rate was 0.6%. No significant differences (p = 0.11) were observed between the rate of SSI of the 892 patients in the preimplementation cohort (0.2%) and that of the 2234 patients in the postimplementation cohort (0.8%). Following multivariable analysis, implementation of preoperative CHG showers was not associated with decreased SSI (adjusted OR 2.96, 95% CI 0.67-13.1; p = 0.15).ConclusionsThis is the largest study, according to sample size, to examine the association between CHG showers and SSI following craniotomy. CHG showers did not significantly alter the risk of SSI after a cranial procedure.

Radiotherapy improves survival for common childhood cancers such as medulloblastoma, leukemia, and germ cell tumors. Unfortunately, long-term survivors suffer sequelae that can include secondary neoplasia. Gliomas are common secondary neoplasms after cranial or craniospinal radiation, most often manifesting as high-grade astrocytomas with poor clinical outcomes. Here, we performed genetic profiling on a cohort of 12 gliomas arising after therapeutic radiation to determine their molecular pathogenesis and assess for differences in genomic signature compared to their spontaneous counterparts. We identified a high frequency of TP53 mutations, CDK4 amplification or CDKN2A homozygous deletion, and amplifications or rearrangements involving receptor tyrosine kinase and Ras-Raf-MAP kinase pathway genes including PDGFRA, MET, BRAF, and RRAS2. Notably, all tumors lacked alterations in IDH1, IDH2, H3F3A, HIST1H3B, HIST1H3C, TERT (including promoter region), and PTEN, which genetically define the major subtypes of diffuse gliomas in children and adults. All gliomas in this cohort had very low somatic mutation burden (less than three somatic single nucleotide variants or small indels per Mb). The ten high-grade gliomas demonstrated markedly aneuploid genomes, with significantly increased quantity of intrachromosomal copy number breakpoints and focal amplifications/homozygous deletions compared to spontaneous high-grade gliomas, likely as a result of DNA double-strand breaks induced by gamma radiation. Together, these findings demonstrate a distinct molecular pathogenesis of secondary gliomas arising after radiation therapy and identify a genomic signature that may aid in differentiating these tumors from their spontaneous counterparts.

We present a patient who had surgically confirmed CD but without the full cushingoid phenotype despite markedly elevated cortisol. Nonpathologic causes of elevated ACTH and cortisol were eliminated as were pathogenic variants in the glucocorticoid receptor gene. Further studies of urine metabolites, cortisol half-life, and the ratios of cortisone to cortisol conversion revealed impaired 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1) activity. There have only been 2 prior reports of impaired 11β-HSD1 resulting in lack of classic cushingoid features in the past 2 decades. Our patient's presentation and previous reports demonstrate the key role of 11β-HSD1 in modulating intracellular cortisol concentration, therefore shielding the peripheral tissues from the effects of excess cortisol. When patients present with markedly elevated cortisol but without classic cushingoid features, impaired 11β-HSD1 should be considered in the differential diagnosis. [ABSTRACT FROM AUTHOR]

This article discusses the predictors of biochemical remission after surgical resection of somatotroph adenomas, which are tumors that produce excessive growth hormone. The study analyzed data from 97 patients who underwent surgery for somatotroph adenomas and found that larger tumor size, cavernous sinus invasion, and higher levels of preoperative growth hormone and IGF-1 were associated with a higher likelihood of remission failure. A machine learning model identified 3D tumor volume and preoperative IGF-1 as important predictors of remission status. The study concludes that patients who achieve postoperative remission typically have preoperative 3D tumor volumes less than 1.51 cm3. [Extracted from the article]

This article, published in the Journal of Neurological Surgery, explores the frequency and significance of hyperenhancement in pituitary neuroendocrine tumors (PitNETs) on preoperative MRI scans. The study involved a retrospective review of patients who underwent transsphenoidal surgery for PitNETs at a single pituitary center from 2012 to 2019. The results showed that 8.5% of PitNETs exhibited hyperenhancement on preoperative contrasted imaging studies. These hyperenhancing tumors were smaller and more commonly microadenomas compared to PitNETs with conventional hypoenhancement. Additionally, patients with hyperenhancing tumors were more likely to present with hypothyroidism and had a higher risk of postoperative diabetes insipidus. [Extracted from the article]

The PRECISE study used convection enhanced delivery (CED) to infuse IL13-PE38QQR in patients with recurrent glioblastoma multiforme (GBM) and compared survival to Gliadel Wafers (GW). The objectives of this retrospective evaluation were to assess: (1) catheter positioning in relation to imaging features and (2) to examine the potential impact of catheter positioning, overall catheter placement and imaging features on long term clinical outcome in the PRECISE study. Catheter positioning and overall catheter placement were scored and used as a surrogate of adequate placement. Imaging studies obtained on day 43 and day 71 after resection were each retrospectively reviewed. Catheter positioning scores, catheter overall placement scores, local tumor control and imaging change scores were reviewed and correlated using Generalized Linear Mixed Models. Cox PH regression analysis was used to examine whether these imaging based variables predicted overall survival (OS) and progression free survival (PFS) after adjusting for age and KPS. Of 180 patients in the CED group, 20 patients did not undergo gross total resection. Of the remaining 160 patients only 53% of patients had fully conforming catheters in respect to overall placement and 51% had adequate catheter positioning scores. Better catheter positioning scores were not correlated with local tumor control (P = 0.61) or imaging change score (P = 0.86). OS and PFS were not correlated with catheter positioning score (OS: P = 0.53; PFS: P = 0.72 respectively), overall placement score (OS: P = 0.55; PFS: P = 0.35) or imaging changes on day 43 MRI (P = 0.88). Catheter positioning scores and overall catheter placement scores were not associated with clinical outcome in this large prospective trial.

It is widely accepted that the standard first-line treatment for most endocrine inactive pituitary macroadenomas (EIA) is surgery, usually via a transsphenoidal approach. What is less clear is what approach to take when these tumors recur, especially when this recurrence involves areas which are difficult to surgically remove tumor from, such as the suprasellar region or cavernous sinuses. We present long term follow-up for a series of 81 patients who underwent repeat surgery for recurrent non-secreting pituitary adenomas. We analyzed data collected from all adult patients undergoing their second microsurgical transsphenoidal resection of a histologically proven endocrine-inactive pituitary adenoma at the University of California at San Francisco between January 1970 and March 2001. Data for these patients were collected by review of medical records, mail, and/or telephone interviews. Visual function, anterior pituitary function, and tumor control rates were analyzed for the series. Records were available for a total of 81 recurrent EIA patients. The median time between their initial and repeat operations was 4.1 years. The mean tumor size was 2.2 +/- 0.2 cm. A total of 35/81 patients had greater than 5 years of follow-up. A total of 24/81 patients had greater than 10 years of follow-up. Over one half of these patients presented with visual disturbance, and we found that 39% of these patients experienced improved vision with a second surgery. More importantly, no one with normal vision suffered any appreciable decline in vision. Approximately, 35% of patients with pre-operative anterior pituitary dysfunction recovered function after surgery in our series; and no patient's function worsened. A total of 4/52 (8%) patients with greater than 2 years of post-op follow-up experienced a clinically meaningful tumor recurrence requiring additional treatment. Our data suggest that when performed by experienced transsphenoidal surgeons, durable tumor control can be obtained in these frequently locally aggressive tumors with acceptable rates of post-operative morbidity.

The evaluation and management of patients with residual Cushing's disease is one of the more complex issues facing neurosurgeons and neuroendocrinologists in clinical practice. There is considerable controversy over several relevant issues such as the timing of the assessment of whether a patient is in remission, what biochemical parameters define remission, the most appropriate course of action to take after residual disease has been defined, etc. As a consequence of the controversies, treating physicians develop notions and fall into certain practice patterns based on evidence of varying levels, their anecdotal experiences, and information gleaned from scientific meetings. This practice pattern, we believe, constitutes the "art of medicine." We conducted a PubMed literature search to identify manuscripts containing data relevant to Cushing's disease, outcomes of various therapeutic modalities, and recurrences. Reference lists were used to identify additional relevant manuscripts. We focused our review on manuscripts that included reasonably large series of patients, those reflecting the experience of pituitary centers and physicians recognized as experts in the field, and those papers felt to represent seminal contributions to the literature. Furthermore, trends in the evaluation and management of relevant patients have been incorporated by the senior author who has seen and evaluated over 750 patients with documented Cushing's syndrome over the past 18 years in clinical practice. An analysis of current evidence indicated that, despite advances in neurosurgical techniques and recent developments in adjuvant therapies, patients with residual Cushing's disease present significant management challenges to treating physicians. In this era, however, it is indeed possible to gain control of the hypercortisolism in most patients. Despite the wide variability in research methodology designed to collect relevant data, a step-wise approach to the management of these patients can be achieved. A logical step-wise approach to the evaluation of postoperative patients with Cushing's disease is essential. Patients with residual disease require the development of an individualized plan of management that takes into account numerous factors pertaining to status of disease, the experience of treating physicians, and available therapeutic modalities.

Flood is one of the most frequently occurring and devastating disasters in Nepal. Several locations in Nepal are at high risk of flood, which requires proper guidance on early warning and safe evacuation of people to emergency locations through optimal routes to minimize fatalities. However, the information is limited to flood hazard mapping only. This study provides a comprehensive flood susceptibility and evacuation route mapping in the Siraha Municipality of Nepal where a lot of flood events have occurred in the past and are liable to happen in the future. The flood susceptibility map was created using a Geographic Information System (GIS)-based Analytical Hierarchy Process (AHP) over nine flood conditioning factors. It showed that 47% of the total area was highly susceptible to flood, and the remaining was in the safe zone. The assembly points where people would gather for evacuation were selected within the susceptible zone through manual digitization while the emergency shelters were selected within a safe zone such that they can host the maximum number of people. The network analysis approach is used for evacuation route mapping in which the closest facility analysis proposed the optimum evacuation route based on the walking speed of evacuees to reach the emergency shelter place considering the effect of slope and flood on the speed of the pedestrian. A total of 12 out of 22 suggested emergency shelters were within 30 min, 7 within 60 min, and 2 within 100 min walk from the assembly point. Moreover, this study suggests the possible areas for further shelter place allocations based on service area analysis. This study can support the authorities' decision-making for the flood risk assessment and early warning system planning, and helps in providing an efficient evacuation plan for risk mitigation. [ABSTRACT FROM AUTHOR]