Adenomatoid hyperplasia of the minor salivary gland arising in the lower lip

Hyperplasia of minor salivary glands is an uncommon clinicopathological entity first described by Giansanti et al. in 1971. We encountered a 47-year-old man who had a mass of the lower lip. The patient's medical history included alcoholic hepatitis, gastric ulcer, and HBs antigen positive. He received therapy irregularly at Tagawa Municipal Hospital, without the use of drugs. He recognized a mass of the left lower lip 1 week ago. The mass was covered with normal mucosa, multiple, and measured 2×1cm in longest diameter. Blood examination results were within normal limits without a positive reaction for HBs antigen. He had smoked cigarettes and drunk beer daily for more than 20 years. CT showed a low density mass and MR T 2 imaging showed a high intensity mass in the lower lip. The clinical diagnosis was a benign tumor of the lower lip. Excision was performed by a Nd: YAG laser with the patient under general anesthesia. The pathological diagnosis was salivary gland hyperplasia.