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Early gallbladder carcinoma: a clinicopathologic study of 13 cases of intramucosal carcinoma.

[carcinoma of the gallbladder]

We report the clinicopathologic features of 13 cases of intramucosal carcinoma (IMC) of the gallbladder. All IMCs were incidental findings in cholecystectomy specimens for cholelithiasis. However, one of the patients had a carcinoma of the pancreas, and the gallbladder incidentally removed during the Whipple procedure showed an IMC. Another patient had a small cell carcinoma of the gallbladder, and one of the sections showed an IMC. Of the IMCs, 10 were well-differentiated adenocarcinomas, 1 was a moderately differentiated adenocarcinoma, 1 was an undifferentiated carcinoma, and 1 was a squamous cell carcinoma. Of the patients, 8 were disease-free from 3 to 11 years, and 2 patients died, one as a result of the pancreatic ductal carcinoma and the other with disseminated metastases of the small cell carcinoma. The follow-up of another patient was too short to be significant. Two patients were lost to follow-up. Our findings suggest that a simple cholecystectomy is a curative procedure for IMCs of the gallbladder.