The document provides guidance on evaluating a patient presenting with an abdominal lump. It outlines taking a thorough history including demographics, present complaints, associated symptoms, past medical history, and family history. A comprehensive physical exam of the abdomen and other systems is described. Differential diagnoses are provided for lumps in various abdominal regions, including the right hypochondrium, epigastrium, lumbar regions, umbilical region, right and left lower quadrants. Recommended investigations are ultrasound and other imaging and labs guided by history and exam to determine the cause.