表皮样囊肿是复层鳞状上皮衬里囊腔,结缔组织内不含皮肤附属器的囊肿,有舌下位和颏下位两种。本院收治1例是舌下位且伴颏下瘘17年,此病例比较少见。现报告如下。患者男性,19岁,汉族,农民。因颏下肿物破溃、溢脓17年,于1997年2月在我院门诊就诊入院。患者于17年前左侧口底出现一条索状肿物,致舌体活动受到限制,经乡卫生院药物治疗(具体不洋),肿物消失,约2月后,颏下出现一麦粒大小的肿物,充血、破溃,经乡卫生院换药治疗未愈,破溃处时常溢出乳黄色粘稠脓样分泌物,平时量少,患者患上感时增多,每日约10滴左右。入院后检查:颏下正中有一0.3×0.3cm的瘘管 Epidermoid cysts are stratified squamous epithelial lining cysts, connective tissue does not contain skin appendages cysts, sublingual and submental bit two. One case admitted to our hospital is sublingual and with a submental fistula for 17 years, this case is relatively rare. The report is as follows. Male patient, 19 years old, Han nationality, farmer. Due to submental rupture of the tumor, overflow pus 17 years, in February 1997 in our hospital clinic admission. Patients in the left side of the mouth 17 years ago appeared a cord-like tumor, tongue activity was limited, the township hospital drug treatment (specifically not foreign), the tumor disappeared, about 2 months after the emergence of a grain of wheat under the chin Size of the tumor, congestion, ulceration, the township hospital dressing treatment healed, ulcer often overflow milk yellow viscous purulent secretions, usually less, the patient feeling increased, about 10 drops daily about. Post-hospital examination: there is a 0.3 × 0.3cm fistula in the middle of the chin