This document discusses the approach to patients presenting with a gallbladder lump. It defines a gallbladder lump and its characteristics including location, tenderness, shape, size and consistency. Potential causes are outlined including mucocele, empyema, periampullary carcinoma and gallbladder carcinoma. The workup and differential diagnosis are described. Management options are provided for each potential diagnosis, including cholecystectomy, antibiotics, drainage procedures, and resection depending on the underlying cause and resectability.