Congenital Extraskeletal Osteochondroma of the Web Space Displacing the Lesser Toes: A Unique Presentation.

Extraskeletal osteochondroma is a rare benign tumor that occurs predominantly in the soft tissues of the hands and feet. The congenital occurrence of this lesion in children is very rare. We report the case of a 9-year-old male who presented with slowly progressive swelling in his left third web space since birth that was painful with prolonged walking and had displaced his fourth toe further laterally, causing both functional and cosmetic problems. Radiographs and computed tomography revealed a well-circumscribed densely ossified lesion. Excision biopsy of the lesion showed a lobulated extraskeletal osteochondroma. At the end of 1 year of follow-up, the child had had no recurrence. To the best of our knowledge, this is the first report of congenital extraskeletal osteochondroma of the foot in English-language published studies.

Coxa saltans caused by extraarticular synovial chondromatosis overlying an isolated osteochondroma of the greater trochanter: A rare aetiology.

Snapping hip is produced by intraarticular and extraarticular pathology. We describe a rare case of extraarticular snapping hip caused by bursal synovial chondromatosis overlying an osteochondroma. A 32-year-old male presented with swelling in his right gluteal region for 6 years associated with pain and snapping on movements since three months. On examination, he had an ill-defined 10 × 6 cm swelling over the posterolateral aspect of the greater trochanter. Plain radiographs revealed an osteochondroma arising from the greater trochanter. Further imaging showed exostosis with possible haemangioma, lipoma or liquefied haematoma overlying it. We proceeded with excision biopsy and intraoperatively found a bursa with synovial chondromatosis overlying the exostosis. At the end of ten months follow up, patient was asymptomatic and had no snapping. We present this case for its rarity, clinical and radiological diagnostic challenges and for its unique presentation.