Synovial sarcoma is a very rare malignant tumor which arising from the Synovial lining connective tissue, tendon sheaths and bursae._
However, there are a few case reports of this tumor arising from the bone. We have experienced 3 cases of the tumor from the bone, i. e. the head of the left fibula, the sacrum and the right ileum, and the distal end of the left femur.
Microscopically they showed typical slit like spaces, lined by epitheloid cells or cuboidal cells and one could easily find out spindle, polygonal, or giant cells.
The proximal third of the left fibula was excised, and the other case arising from the sacrum & right ilium was treated with radiation therapy. Another case refused hip disarticulation. The effectiveness of the treatment is uncertain.
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