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Background: Scores from the NBME Subject Examination in Surgery (Surgery Shelf) positively correlate with United States Medical Licensing Examination Step 1 (Step 1). Based on this relationship, the authors evaluated the predictive value of Step 1 on the Surgery Shelf., Methods: Surgery Shelf standard scores were substituted for Step 1 standard scores for 395 students in 2012-2014 at one medical school. Linear regression was used to determine how well Step 1 scores predicted Surgery Shelf scores. Percent match between original (with Shelf) and modified (with Step 1) clerkship grades were computed., Results: Step 1 scores significantly predicted Surgery Shelf scores, R 2  = 0.42, P < 0.001. For every point increase in Step 1, a Surgery Shelf score increased by 0.30 points. Seventy-seven percent of original grades matched the modified grades., Conclusion: Replacing Surgery Shelf scores with Step 1 scores did not have an effect on the majority of final clerkship grades. This observation raises concern over use of Surgery Shelf scores as a measure of knowledge obtained during the Surgery clerkship., (Copyright © 2016 Elsevier Inc. All rights reserved.)

Background: Acute gangrenous cholecystitis (AGC) is a medical emergency that carries high morbidity. The objective of this study is to define risk factors for this disease., Methods: A retrospective review of patients who underwent cholecystectomy while admitted to the Acute Care Surgery Service from January 2009 to April 2014 was performed. Specimen reports were evaluated to identify patients with AGC and cholecystitis without necrosis (CN). Preoperative factors as well as outcomes were compared between the groups., Results: A total of 483 patents underwent cholecystectomy. Four hundred fifty-nine patients were found to have CN and 24 patients were found to have AGC. Pre-existent factors such as diabetes, coronary artery disease, and systemic inflammatory response syndrome predicted AGC on a logistic regression. Patients with AGS were also more commonly older, male, and had a higher preoperative bilirubin. Mortality was significantly higher in patients with AGC (12.5% vs .9%, P = .003)., Conclusions: AGC carries an increased mortality rate compared with CN. Older patients with diabetes, coronary artery disease, and elevated bilirubin should be suspected of having AGC., (Copyright © 2015 Elsevier Inc. All rights reserved.)