[Clinical and pathological analysis of 31 cases of salivary gland basal cell adenoma].

The clinical and pathological features of basal cell adenoma were analysed. In 31 cases 12 occurred in men and 19 in women, a ratio of 1:1.58. The mean age of the patients was 48.5 years, with a range from 30 to 75 years, and the majority were 40-49 years of age. 27 cases occurred in parotid glands. The tumor was round or oval in shape. There were complete capsules in 28 cases. The tumor on section was solid in 20 cases and solid with cyst in 11 cases. There were three types under microscope. The reticular type-23 cases, the tubular type-3 cases, these two types were well differentiated. The massive type-5 cases, in which 2 cases had incomplete capsules and 1 case had no capsule, 3 cases had transformed to carcinoma in local region, this type was slightly poorly differentiated.