Pancreatic neuroendocrine tumors: accurate grading with Ki-67 index on fine-needle aspiration specimens using the WHO 2010/ENETS criteria.

Background: The natural history of pancreatic neuroendocrine tumors (panNETs) is extremely variable. One of the most controversial problems in diagnosis is the accurate prediction of the clinical behavior of these tumors. PanNETs that behave aggressively with a malignant course may have bland cytologic features, while some tumors with previously described "malignant" features may behave in a benign or indolent fashion.

Factors influencing obstetric and gynecologic patients' decisions toward medical student involvement in the outpatient setting.

Objective: We sought to determine the reasons for obstetric and gynecologic patients' acceptance or refusal of medical student participation in their outpatient care.

Study Design: A descriptive and analytic cross-sectional study of 180 patients at the University of California, San Francisco, was done to identify factors involved in patient acceptance or refusal of medical student participation in their outpatient obstetric-gynecologic visit. Responses were analyzed by Cochran-Mantel-Haenszel tests for rank order tests of factors involved in the decision to accept or decline medical student participation and chi(2) or Fisher exact tests for comparison of data among different groups.

Head entrapment and neonatal outcome by mode of delivery in breech deliveries from 28 to 36 weeks of gestation.

Objectives: We attempted to determine whether there are differences in the incidence of head entrapment and adverse neonatal outcome by mode of delivery in breech deliveries from 28 to 36 weeks of gestation.

Study Design: Computerized data and charts of 321 viable consecutive singleton breech deliveries from 28 to 36 weeks' gestation were reviewed. Statistical methods used included chi2, logistic regression, and analysis of variance.

Head entrapment and neonatal outcome by mode of delivery in breech deliveries from twenty-four to twenty-seven weeks of gestation.

Objectives: Our purpose was to determine whether there are differences in the incidence of head entrapment and adverse neonatal outcome by mode of delivery in breech deliveries from 24 to 27 weeks of gestation.

Study Design: Charts of 132 viable consecutive singleton breech deliveries from 24 to 27 weeks' gestation were reviewed. Statistical methods used included chi 2, logistic regression, and analysis of variance.