431 research outputs found

    Endorectal repair of rectocele.

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    A modification of Sullivan\u27s procedure for endorectal repair of low rectocele was completed in 59 patients with local anesthesia. Associated anorectal pathology was corrected in all patients. The technique is described. At follow-up, the results were as follows: 37 excellent (62.7 per cent), 10 good (16.9 per cent), eight fair (13.6 per cent), and four poor (6.7 per cent)

    Swift follow-up of IceCube triggers, and implications for the Advanced-LIGO era

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    Between 2011 March and 2014 August Swift responded to 20 triggers from the IceCube neutrino observatory, observing the IceCube 50% confidence error circle in X-rays, typically within 5 hours of the trigger. No confirmed counterpart has been detected. We describe the Swift follow up strategy and data analysis and present the results of the campaign. We discuss the challenges of distinguishing the X-ray counterpart to a neutrino trigger from serendipitous uncatalogued X-ray sources in the error circle, and consider the implications of our results for future strategies for multi-messenger astronomy, with particular reference to the follow up of gravitational wave triggers from the advanced-era detectors.Comment: Accepted for publication in MNRAS. 18 pages, including 8 figures and 4 tables; two of which are landscape-oriente

    Ileorectal anastomosis for ulcerative and Crohn\u27s colitis.

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    Except in the presence of severe perineal suppuration or sphincter damage by previous surgery for fistulas, the rectum was preserved in all patients considered candidates for surgery for inflammatory disease of the bowel. A primary anastomosis with a single-layer 5-0 monofilament stainless steel wire was carried out when a relatively healthy rectum with erythema and granularity presented. For patients with more severe disease of the rectum, a two-stage operation with intensive interval treatment of the rectum stump with topical corticosteroids was carried out. Of a total of eighty-six patients with involvement of the colon and rectum with either Crohn\u27s disease or chronic ulcerative colitis, fifty-six patients were treated by local abdominal colectomy and ileorectal anastomosis. Twenty-four had primary anastomosis and thiry-two had a two-stage operation. One anastomotic dehiscence developed. A mean follow-up of 8.4 years (6 months to 20 years) has been satisfactory. Only three anastomoses have been taken down for unsatisfactory results. With the proper selection of patients and with appropriate treatment of the diseased rectal segment, a large majority of patients with inflammatory disease of the bowel can have long-term salutory results after colectomy and ileorectal anastomosis

    Robo-AO M-dwarf Multiplicity Survey: Catalog

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    We analyze observations from Robo-AO's field M dwarf survey taken on the 2.1 m Kitt Peak telescope and perform a multiplicity comparison with Gaia DR2. Through its laser-guided, automated system, the Robo-AO instrument has yielded the largest adaptive optics M dwarf multiplicity survey to date. After developing an interface to visually identify and locate stellar companions, we selected 11 low-significance Robo-AO detections for follow-up on the Keck II telescope using NIRC2. In the Robo-AO survey we find 553 candidate companions within 4'' around 534 stars out of 5566 unique targets, most of which are new discoveries. Using a position cross-match with DR2 on all targets, we assess the binary recoverability of Gaia DR2 and compare the properties of multiples resolved by both Robo-AO and Gaia. The catalog of nearby M dwarf systems and their basic properties presented here can assist other surveys which observe these stars, such as the NASA TESS mission

    WDHA syndrome caused by pheochromocytoma: report of a case.

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    A case in which a pheochromocytoma secreted vasoactive intestinal peptide, causing WDHA syndrome, is reported. The patient, a 43-year-old woman, was seen because of intractable watery diarrhea, hypokalemia and weight loss. She was found to have a mass in the right adrenal area. Preoperatively, vasoactive intestinal peptide levels were elevated, and the diagnosis of WDHA syndrome was entertained. Exploratory laparotomy revealed a tumor of the right adrenal gland, measuring 15 x 15 cm, which was resected. Histologic examination revealed it to be a pheochromocytoma. Postoperatively, vasoactive intestinal peptide returned to normal. The patient had complete remission of symptoms, and has remained well since

    TERT Promoter Mutation Detection in Cell-Free Tumor-Derived DNA in Patients with IDH Wild-Type Glioblastomas: A Pilot Prospective Study

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    Purpose: We conducted a pilot study to assess the feasibility and the potential implications of detecting TERT promoter (TERTp)–mutant cell-free tumor-derived DNA (tDNA) in the cerebrospinal fluid (CSF) and plasma of glioblastoma patients. Experimental Design: Matched CSF and plasma samples were collected in 60 patients with glial tumors. The CSF collection was obtained during surgery, before any surgical manipulation of the tumor. The extracted tDNA and corresponding tumor DNA samples were analyzed for TERTp and isocitrate dehydrogenase (IDH) hotspot mutations. In addition, the variant allele frequency (VAF) of TERTp mutation in the CSF-tDNA was correlated with tumor features and patients’ outcome. Results: Thirty-eight patients had TERTp-mutant/IDH wild-type glioblastomas. The matched TERTp mutation in the CSF-tDNA was successfully detected with 100% specificity (95% CI, 87.6–100%) and 92.1% sensitivity (95% CI, 78.6–98.3%) (n = 35/38). In contrast, the sensitivity in the plasma-tDNA was far lower [n = 3/38, 7.9% (95% CI, 1.6–21.4%)]. We concordantly observed a longer overall survival of patients with low VAF in the CSF-tDNA when compared with patients with high VAF, irrespective of using the lower quartile VAF [11.45%; 14.0 mo. (95% confidence interval, CI, 10.3–17.6) vs. 8.6 mo. (95% CI, 4.1–13.2), P = 0.035], the lower third VAF [13%; 15.4 mo. (95% CI, 11.6–19.2) vs. 8.3 mo. (95% CI, 2.3–14.4), P = 0.008], or the median VAF [20.3%; 14.0 mo. (95% CI, 9.2–18.7) vs. 8.6 mo. (95% CI, 7.5–9.8), P = 0.062] to dichotomize the patients. Conclusions: This pilot study highlights the value of CSF-tDNA for an accurate and reliable detection of TERTp mutations. Furthermore, our findings suggest that high TERTp mutation VAF levels in the CSF-tDNA may represent a suitable predictor of poor survival in glioblastoma patients. Further studies are needed to complement the findings of our exploratory analysis

    Differential Effects of Methylphenidate on Problem Solving in Adults With ADHD

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    Objective: Two studies were performed to assess both divergent and convergent thinking in adults with ADHD. Method: The first study compared the problem-solving abilities of healthy participants (N = 144) and unmedicated adults with ADHD (N = 144). In the second study, problem-solving abilities of adults with diagnosed ADHD (N = 22) were examined twice, that is, on and off methylphenidate (MPH), and compared with the performance of a healthy control group (N = 22). Convergent thinking was measured using a Tower of London task, whereas divergent thinking was assessed using verbal fluency tasks. Results: Adults with ADHD off MPH displayed marked deficits of both divergent and convergent thinking. MPH treatment resulted in a marked improvement of convergent thinking, while no effect of medication was found regarding divergent thinking. Conclusion: Pharmacological treatment of adults with ADHD revealed a differential effect of MPH on problem solving abilities

    Differential affinity of FLIP and procaspase 8 for FADD’s DED binding surfaces regulates DISC assembly

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    Death receptor activation triggers recruitment of FADD, which via its death effector domain (DED) engages the DEDs of procaspase 8 and its inhibitor FLIP to form death-inducing signalling complexes (DISCs). The DEDs of FADD, FLIP and procaspase 8 interact with one another using two binding surfaces defined by α1/α4 and α2/α5 helices, respectively. Here we report that FLIP has preferential affinity for the α1/α4 surface of FADD, whereas procaspase 8 has preferential affinity for FADD's α2/α5 surface. These relative affinities contribute to FLIP being recruited to the DISC at comparable levels to procaspase 8 despite lower cellular expression. Additional studies, including assessment of DISC stoichiometry and functional assays, suggest that following death receptor recruitment, the FADD DED preferentially engages FLIP using its α1/α4 surface and procaspase 8 using its α2/α5 surface; these tripartite intermediates then interact via the α1/α4 surface of FLIP DED1 and the α2/α5 surface of procaspase 8 DED2

    Robo-AO M-dwarf Multiplicity Survey: Catalog

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    We analyze observations from Robo-AO's field M dwarf survey taken on the 2.1 m Kitt Peak telescope and perform a multiplicity comparison with Gaia DR2. Through its laser-guided, automated system, the Robo-AO instrument has yielded the largest adaptive optics M dwarf multiplicity survey to date. After developing an interface to visually identify and locate stellar companions, we selected 11 low-significance Robo-AO detections for follow-up on the Keck II telescope using NIRC2. In the Robo-AO survey we find 553 candidate companions within 4'' around 534 stars out of 5566 unique targets, most of which are new discoveries. Using a position cross-match with DR2 on all targets, we assess the binary recoverability of Gaia DR2 and compare the properties of multiples resolved by both Robo-AO and Gaia. The catalog of nearby M dwarf systems and their basic properties presented here can assist other surveys which observe these stars, such as the NASA TESS mission
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