Abstract
Specimens from 3197 consecutive and unselected cholecystectomies performed during a 6-year period were studied. Adenomyomatosis of the gallbladder was defined as a lesion characterized by a thickened wall that consisted of Rokitansky-Aschoff sinuses surrounded by proliferated fibromuscular tissue. Adenomyomatosis was found in 279 specimens and classified as one of three types: segmental, fundal, or diffuse. Segmental adenomyomatosis was found in 188 specimens; gallbladder cancer (GBC) developed in 12 (6.4%) of the patients with segmental type adenomyomatosis. GBC developed in the mucosa of the fundal compartment distal to the annular stricture of the segmental type adenomyomatosis in all 12 of these patients. Conversely, GBC developed in 93 (3.1%) of the other 3009 patients (those with fundal alone, diffuse, or no adenomyomatosis). The prevalence of GBC in patients with segmental adenomyomatosis was significantly (P less than 0.025) higher than that of patients without segmental adenomyomatosis. Clinicians should be aware that segmental adenomyomatosis often coexists with GBC.
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