抄録
A case of steatocystoma simplex (SCS) near the right angle of the mouth in a 42-year-old woman is reported. A mass about 1.0×1.0cm in diameter was formed in the subcutaneous tissue. The mass was elastic soft and movable. The overlying skin and underlying oral mucosa appeared normal. No similar lesions were found in any other part of the body. The mass, suspected to be a benign tumor, was extirpated intraorally. Histopathologically, a cyst cavity lined with thinly layered squamous epithelium was observed. The epithelium did not have any stratum granulosum, but a hyalinized eosinophilic cuticle was observed at the outermost layer. Some sebaceous glands were scattered in the cyst wall, and a few glands were situated on the epithelial surface. From these findings, the lesion was diagnosed as a SCS.
