皮质旁骨肉瘤是起源于骨膜或骨旁结缔组织的一种特殊类型的骨肉瘤,现将我们遇到的一例报告如下:病历摘要李×,男,21岁。因一个半月前发现右小腿中部有一约指甲大小的圆形肿物,逐渐增大住院。 Paraneoplastic osteosarcoma is a special type of osteosarcoma originated from periosteum or para-lumen connective tissue. Now we have reported one case that we encountered as follows: Medical record summary Li X, male, 21 years old. One month and a half ago, hospitalization was gradually increased as it was found that there was a round tumor about the size of a fingernail in the middle of the right calf.