The Museum contains over 3,000 specimens (or "pots"), which display diseased human tissue at the macroscopic level preserved in formalin. Specimens are arranged in one of two major groups - pathological processes such as congenital and vascular or by organ systems, such as renal and skin. Each specimen is numbered and accompanied by a clinical history (if known), a description of the evident abnormalities, and a histological description of changes (if relevant). That information, specific to each of 30 areas or "bays", is found in the catalogues located within each bay.