Osteochondroma of the pisiform: A case report.

BACKGROUND: Osteochondroma, a benign bone tumour, is commonly seen in the metaphyseal region of long bones. It is not so common in short bones and occurs rarely in carpals. The literature involving an osteochondroma of pisiform is scarce. CASE SUMMARY: We present a 12-year-old male Asian child with a gradually progressive, bony, hard swelling on the volar aspect of the right wrist, which, on investigation, was suggestive of a solitary osteochondroma of the pisiform and its management. CONCLUSION: The current report describes a child with a wrist swelling which on evaluation was found to be an osteochondroma of the pisiform, which is seldom described in the literature, and managed by excision biopsy. Though osteochondromas of the carpal bones are rare they should be included in the differential of any wrist swelling with the symptom complex varying from pressure effects to surrounding soft tissues and nerves, attritional tendon ruptures, carpal instabilities and arthritis.