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Role of MRI in the Evaluation of Primary Bone Tumors

Introduction: Bone tumors and tumor like conditions encompass a complex and variegated group of disorders requiring the combined efforts of the orthopedic surgeon, radiologists and the pathologists to appropriately manage. Current study was designed to assess the accuracy of M.R.I. in local staging of primary bone tumors and also to study the signal characteristics of primary bone tumors and correlate with surgical and pathological findings. Material and Methods: A clinical suspicion of bony neoplasm (or conditions mimicking bone tumors) were first evaluated with plain radiographs taken in at least two different projections. patients with a high suspicion of primary bone neoplasms (or conditions mimicking them) and in whom surgery was viable options were referred to the radiology department for further evaluation with MRI. 68 consecutive patients were enrolled for the study and were followed up. Results: 37 patients had primary bone malignancies out of which three were in the spine-plasmacytoma (N=2) and Chordoma (N=1). 14 patients had metastatic disease including systemic lymphomas with secondary bone involvement. 3 patients had osteomyelitis.16 lesions were located to the axial skeleton out of which 11 were in the spine. 38 lesions were in the appendicular skeleton with the lesions around the knee joint (distal femora and proximal tibia) being the commonest. Osteosarcoma was the most common primary malignant bone tumor and Giant cell tumor was the most common benign