DISCUSSION: MC is a rare but aggressive form of tumor representing about 2% of all chondrosarcomas arising in the osseous tissue of the adult skeleton.1,2 Diagnosis is usually made based on clinical, radiological and histopathological features. 2 MCs are relatively chemo-resistant and the role of radiation remains unclear. However some studies have suggested surgical excision, chemotherapy, and radiation in treating and preventing recurrence and metastasis. Osteogenic sarcoma, chondrosarcoma, synovial sarcoma, and giant cell tumors have been known to present as calcified lung nodule. Similarly certain carcinomas (papillary and mucinous adenocarcinomas) can present as calcified lung metastases. The mechanism for calcification include: dystrophic calcification, bone formation, calcification of tumor cartilage, and mucoid calcification.3 The pattern of calcification although helpful can sometimes be misleading as in this case.