Clinical Study of Osteoid Osteoma / 대한정형외과학회잡지

Osteoid osteoma is a small, oval or roundish, nidus like neoplasm of bone. The lesion usually does not exceed a centimenter in its greatest dimension, and it consists of osteoid, trabeculae of newly formed osseous tissues and a substratum of highly vascularized osteogenic connective tissue. In a differential diagnosis, consideration should be given to Brodies abscess, sclerosing osteomyelitis of Garre, Fibrous dysplasia and healing fractures. From Janua 1960 to December 1980, we have seen and studied 18 cases of osteoid osteoma and the results obtained from this study were follows: l. Eleven cases were found in second decade and 17 cases were developed before thirty years old. 2. The sex ratio was nearly equal and duration of disease from onset was average 16 months. 3. Location of lesions were predominantly in lower extremities, 9 in tibia and 3 in femur. 4. Pain was noted in 16 cases and aspirin affected in 8 cases. 5. Nidus was found in 11 cases. 6. All cases were treated by radical excision of lesions with disappearance of pain and satisfactory results.

Synovial Sarcoma of Bone / 대한정형외과학회잡지

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.

A Case of Pigmented Villonodular Synovitis / 대한정형외과학회잡지

A case of pigmented villonodular synovitis developed in the right ankle joint is reported. The patient was a 25 years old house wife who had complained marked swelling and tenderness over the anterolateral aspect of the right ankle for 2 years. Roentgenological studies showed marked swelling of the ankle joint and erosion of the neck of the talus. Synovectomy of the affected joint was performed. The tumor mass, measuring about 7cm×5cm×2cm in size, was yellowish brown in colour, elastic and soft in consistency, and contained several well encapsulated nodules.