دانلود مقاله کندروسارکوم ثانویه از استئوکندروم پروگزیمال ساق پا
Osteochondromas are the most common benign tumors of the bones, representing 35% of benign bone tumors and occurring in 3% of the general population.1-3) Patients usually present with an osteochondroma during the second and third decades of life. Although osteochondromas can occur in any bone, they are found most commonly around the knee and the shoulder. Patients undergo surgical treatment due to growth disturbance, nerve compression, joint motion limitation, pain, tendon irritation, overlying bursitis or malignant transformation. Osteochondromas in the proximal tibia are frequently symptomatic because of abundant tendinous structures and lack of the soft tissue. Surgical resection of an osteochondroma of the medial condyle of the proximal tibia is relatively easy. However, for the lateral side, the peroneal nerve and the fibula make it difficult to extirpate the lesion. Malignant transformation is the most serious complication of an osteochondroma. Less than 1% of osteochondromas undergo malignant transformation into secondary chondrosarcoma.4-6) Even though surgical resection is the mainstay of therapy, few reports dealt with surgical treatment of secondary malignancy of osteochondromas arising from the lateral side of the proximal tibia. In this report, we introduce a surgical procedure and outcomes for secondary chondrosarcoma from an osteochondroma of the proximal tibia involving the fibula.