腺样囊性癌是一种发生在唾腺的恶性肿瘤。口腔内小唾液腺更为常见,肿瘤向周围缓慢、浸润性生长,破坏神经血管、骨骼为特征。发病年龄在40～60岁之间,女性多于男性,此病屡见不鲜,但腺样囊性癌化生为鳞癌的报告极为罕见。现报告1例如下。 Adenoid cystic carcinoma is a malignant tumor that occurs in the salivary glands. Small salivary glands are more common in the oral cavity, and the tumor is slowly and infiltratively grow around, and it is characterized by destruction of nerve vessels and bones. The age of onset is between 40 and 60 years old. There are more women than men. This disease is not uncommon. However, the report of adenoid cystic carcinoma metaplasia as squamous cell carcinoma is extremely rare. The report 1 is for example below.