Osteochondroma of Proximal Ulna – A rare case presentation

INTRODUCTION: Osteochondroma is a most common primary bone tumor which forms due to exophytic protuberance on the surface of growing bones. Proximal ulna is an atypical location for osteochondroma. The case report is a rare solitary presentation and has been only twice reported in the literature. CASE REPORT: This case reports a rare presentation of a 35 year old Hindu male with osteochondroma at proximal ulna which is painful with terminal restriction of the elbow joint movement. Surgical excision was performed and histopathology confirmed the diagnosis. Patient was asymptomatic with full range of movement of the elbow joint at 2 months of follow-up and there were no signs of recurrence at 2 years of follow-up. CONCLUSION: Atypical presentation is a possibility; therefore, surgeon should always keep in mind the possibility of the tumor and accurately diagnose the tumor with the help of imaging modalities and biopsy.