Rare case of sacral mass due to chondromyxoid fibroma.

in the axial skeleton. Fibroma, aneurysmal bone cyst, chondroblastoma and fibrous dysplasia must be evaluated in the radiographic differential diagnosis of chondromyxoid fibroma. Being an eccentric metaphyseal location, showing sharp, sclerotic, scalloped margins and matrix calcification are its major radiographic features. In pathological evaluation, the tumour shows a distinctly lobulated pattern of growth, with peripheral hypercellularity of the lobules, and the tumour cells are spindled and stellate. The stroma is myxoid, but rarely wellformed hyaline cartilage is present. An 18-year-old male patient was admitted to our clinic with increasing coccydynia for 6 months. Figure 1 Anteroposterior roentgenography of the sacrum. Figure 2 Lateral roentgenography of the sacrum.