Highlights Gallbladder volvulus is a challenging radiological diagnosis. Hepatobiliary iminodiacetic acid (HIDA) scans demonstrate no filling of the gallbladder in gallbladder volvulus. Persisting cholecystitis symptoms in the absence of gallstones can be indicative of gallbladder volvulus.

Background: The purpose of this project is to identify prognostic features in resectable pancreatic head adenocarcinoma and use these features to develop a machine learning algorithm that prognosticates survival for patients pursuing pancreaticoduodenectomy. Methods: A retrospective cohort study of 93 patients who underwent a pancreaticoduodenectomy was performed. The patients were analyzed in 2 groups: Group 1 (n = 38) comprised of patients who survived < 2 years, and Group 2 (n = 55) comprised of patients who survived > 2 years. After comparing the two groups, 9 categorical features and 2 continuous features (11 total) were selected to be statistically significant (p < .05) in predicting outcome after surgery. These 11 features were used to train a machine learning algorithm that prognosticates survival. Results: The algorithm obtained 75% accuracy, 41.9% sensitivity, and 97.5% specificity in predicting whether survival is less than 2 years after surgery. Conclusion: A supervised machine learning algorithm that prognosticates survival can be a useful tool to personalize treatment plans for patients with pancreatic cancer.

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Introduction and importance Gallbladder contusion after blunt abdominal trauma is a rare event that presents with diagnostic challenges. There is no clear evidence supporting conservative or surgical management of gallbladder contusion injuries, especially when they present in isolation. Here, we report the first case of an isolated gallbladder contusion injury after blunt abdominal trauma resulting in hemorrhagic cholecystitis that was successfully managed non-operatively. Case presentation A 22-year-old male patient presented with a 3-day history of severe right upper quadrant pain, leukocytosis, and elevated bilirubin after suffering blunt abdominal trauma from being kicked in the abdomen during a soccer game. The patient was evaluated using computed tomography (CT), ultrasound (US), and magnetic resonance cholangiopancreatography (MRCP). His imaging findings were consistent with cholecystitis without cholelithiasis. His bloodwork and imaging were initially concerning for choledocholithiasis, but were later determined to be blood products within the common bile duct (CBD). Through conservative management, which included antibiotics, bed rest, and bowel rest, he had complete resolution of symptoms and normalization of bloodwork after four days of admission and remained symptom free at 1-year. Clinical discussion This case serves to highlight isolated gallbladder contusion as a potential outcome of blunt abdominal trauma. We re-affirm the diagnostic inconsistencies between CT and US in the work-up of cholecystitis and other biliary pathology. Furthermore, we describe the role of non-operative management in the treatment of traumatic cholecystitis, in the absence of gallstones. Conclusion Gallbladder contusion and hemorrhagic cholecystitis after blunt abdominal trauma can be managed with non-operative interventions.

Background. Benign perianal disease carries significant morbidity and financial burden on the healthcare system. Given that sitz baths are recommended as a treatment modality, we considered whether using a continuous stream of water, in the form of a bidet, offers a convenient and effective alternative. Bidet use is the predominant form of perianal hygiene in Asia, but its role in perianal disease is unknown. Purpose. To critically analyze and systematically review the current evidence regarding the effect of habitual bidet use on symptoms of benign perianal disease. Data Sources. A database search was conducted on MEDLINE and Epub Ahead of Print, Embase, ClinicalTrials.gov, the Cochrane Library, and ProQuest Dissertations. All studies on bidet use in pruritus ani, hemorrhoids, or anal fissures were included. Data Extraction. The studies were screened and critically analyzed by two independent reviewers in line with PRISMA guidelines. Results. Two prospective trials and 1 cross-sectional study found that habitual use of bidets had no impact on the odds of developing hemorrhoids or hemorrhoidal symptoms. One RCT concluded that using bidets was non-inferior to sitz bath for post-hemorrhoidectomy pain. Two prospective trials and 1 cross-sectional study determined that habitual bidet use may increase the odds of developing pruritus ani. Two case series found that habitual bidet use may cause perianal burns or anterior anal fissures. A meta-analysis was not performed because only a limited number of studies were available, and they were of variable quality. Conclusion. The current evidence does not identify using bidets as a treatment modality for perianal disease, and further research is warranted to study this increasingly utilized technology.