硬纤维瘤是发生于肌肉、腱膜和深筋膜的一种良性肿瘤 ,较为少见。国内报道不多［１ ,２］。我们遇到４例 ,结合文献 ,讨论报告如下。１病例例１,男 ,１１岁。发现右臀部肿物４０天 ,走路跛行２０天入院。不伴疼痛及发热 ,无外伤史。查体右臀部有一局限性隆起 ,表面无红肿 ,皮温 Demyeloma is a benign tumor that occurs in muscle, aponeurosis and deep fascia, and is rare. There are not many domestic reports [1, 2]. We encountered 4 cases, combined with literature, discussed the report as follows. 1 Case example 1, male, 11 years old. He found a right hip mass for 40 days and walked for 20 days before admission. No pain and fever, no history of trauma. There is a localized bulge in the right hip of the patient. There is no swelling on the surface. Skin temperature