毛囊瘤(trichofolliculoma,)又称毛囊症(hairfollicle nevus,)系一种皮肤良性肿瘤,临床极为少见。常为一孤立小结节。好发于成年人面部,偶可发生于青少年。初起时皮损小,以后逐渐变大。偶有发展恶变者。国内除天津医学院报道一例外未见同类报道,国外报道亦少。我科于近期内收治一例,报道如下: Hair follicle nevus, also called hair follicle nevus, is a kind of cutaneous benign tumor. It is extremely rare in clinical practice. Often a solitary nodule. Occurs in adult faces and occasionally occurs in adolescents. The skin lesions are small at the beginning and gradually become larger later. Occasionally develop malignant change. In addition to the report of Tianjin Medical College in China, no report of the same type was reported and there were few foreign reports. Our department will receive one case in the near future. The report is as follows: