骨化性纤维瘤是一种少见的原发性良性骨肿瘤。好发于颌骨，偶见于长管骨。病灶多单发，生长缓慢，多见于青少年。现报告两例发生于长管状骨的骨化性纤维瘤。１病例报告例１男，１１岁。３年前无意中发现左小腿中上部小突起，质硬，逐渐增大，无明显症状。近２月感隐痛。查... Ossification fibroma is a rare primary benign bone tumor. Occurs in jaw bones, occasionally in long bones. The lesions are more solitary and grow slowly. They are more common in young people. Two cases of ossifying fibroids occur in long bones. 1 case report 1 male, 11 years old. 3 years ago, he found a small protrusion in the middle and upper part of the left calf, which was hard and gradually increased without obvious symptoms. Feeling pain in the last February. check...