Solitary Osteochondroma of the Distal Radius in a 17-Year-Old Female: A Rare Case Report

Osteochondroma is the most common benign bone tumour, but its occurrence at the distal radius is rare. These tumours usually arise from the metaphyseal region of long bones such as the femur, tibia, and humerus, making distal radial involvement particularly uncommon. Here, a case of a 17-year-old female with a progressively enlarging, painless swelling over her dominant wrist is presented. Radiographs revealed a sessile bony outgrowth continuous with the cortex and medulla of the distal radius, and Magnetic Resonance Imaging (MRI) confirmed a cartilage-capped lesion without soft tissue extension. The mass, measuring 4.5×4.5×3 cm, was excised completely via a volar approach with base curettage and bone cementing. Histopathology confirmed the diagnosis of osteochondroma. Postoperative recovery was uneventful, and at six-month follow-up, the patient had full wrist function and no recurrence. This case highlights the importance of thorough radiological evaluation for accurate diagnosis and surgical planning. Distal radial osteochondromas are uncommon in adolescents, and reporting such cases adds to the limited global and regional literature. Complete excision provides excellent functional and cosmetic outcomes, emphasising the need for awareness of this rare presentation in clinical practice.