横纹肌肉瘤成人少见,儿童常患,占儿童恶性肿瘤总数的5％,美国15岁以下儿童年发病率为百万分之5.7,70％在10岁以下,高峰在2～5岁(Young等,1975)。发于头颈部者占此瘤患者总数的36～41％,并以眶部为最多(Green,1978等)。此瘤质软,呈鱼肉状。依坏死程度呈粉红或灰粉红色。组织学上分多形型、胚胎型和 Rhabdomyosarcoma is rare in adults, with children often affected, accounting for 5% of the total number of pediatric malignancies, with an annual incidence rate of 5.7ppm in the United States of children under 15 years of age at 10 years of age and a peak of 2 to 5 years (Young et al. 1975). Hair in the head and neck accounted for 36 to 41% of the total number of patients with this tumor, and most of the orbit (Green, 1978, etc.). This tumor soft, was fish-like. According to the degree of necrosis was pink or gray pink. Histologically, multi-type, embryo-type and