表皮样囊肿常发生于真皮或皮下组织内,发生在指骨内较罕见。现将我院遇到的1例报道如下,并结合文献进行讨论。病史摘要:患者,男性,44岁,住院号28654。因左拇指指端逐渐肿大5月余就医,无疼痛或发热等不适反应。患者经常使用电脑键盘,但否认曾有局部外伤史。入院检查:一般情况良好,除局部病变外余无异常。左手拇指末节膨大,指甲外突畸形,质硬,有 Epidermoid cysts often occur in the dermis or subcutaneous tissue and occur less frequently in the phalanx. One case reported in our hospital is now reported as follows and discussed in conjunction with the literature. Medical history summary: Patient, male, 44 years old, hospital number 28654. Gradually swollen from the left thumb tip for more than 5 months for medical treatment, no pain or fever and other unpleasant reactions. Patients often use computer keyboards, but denied having had a history of local trauma. Admission examination: In general, there is no abnormality except local lesions. The distal part of the left thumb is enlarged and the nails are deformed outwards. The quality is hard.