Primary osteosarcoma of the talus

Osteosarcoma (OS) of the talus is extremely rare and few cases have been reported in the literature. We present a acse of 33-year-old male with painfull sweeling of his left ankle joint. He underwent several radiological diagnostic modalities that showed osteolytic lesion in the posterior aspect of the left talus associated with new bone formation projecting from the posteriorimedial aspect of that bone. His chest x-ray showed multiple rounded lung metastases, some of them showed calcifications. Open biopsy was performed. The histopathology confirmed the diagnosis of osteoblastic OS of the talus. (author)