CT of Hodgkin's lymphoma limited to the gallbladder

A complex mass confined to the gallbladder found on CT is unusual, but nor rare, with causes including benign inflammatory disease, early primary carcinoma and metastases. Non-Hodgkin's lymphoma is rare and Hodgkin's disease, prior to the current case, unheard of involving just the gallbladder. Thus, this should be considered part of the differential diagnosis of a complex gallbladder mass.