Table 1.

Clinical and pathological data of patients with gallbladder adenomas, adenocarcinoma and its putative precursor lesions

Lesion	Sex	Age (yr, mean ± SD)
Normal mucosa (n = 5)	F (5)	54.6 ± 9.0
Pyloric adenoma (n = 15)	F (13)/M (2)	55.2 ± 3.5
Intestinal adenoma (n = 6)	F (6)	68.5 ± 1.7
Pyloric-type metaplasia (n = 20)	F (20)	51.5 ± 3.2
Intestinal metaplasia (n = 24)	F (24)	50.0 ± 3.4
Carcinoma in situ (n = 10)	F (9)/M (1)	65.8 ± 2.5
Invasive carcinoma (n = 12)	F (9)/M (3)	66.0 ± 3.8

According to WHO classification. F: Female; M: Male.