This document contains multiple choice questions about diagnosing various medical conditions based on symptoms, risk factors, imaging findings, and other presenting features. Key topics covered include diagnosing gallbladder stones versus polyps based on sonographic features, identifying parts of the gallbladder on imaging, risk factors for cholesterol gallstones, important signs of acute cholecystitis on imaging, diagnosing preterm and term infants with tachypnea based on presentation and imaging findings, diagnosing a 5 day old neonate with neutropenia and tachypnea, and making several other diagnoses.