Asian Journal of Case Reports in Surgery

Introduction: Osteochondromas are the most common benign bone tumors, but their scapular location, particularly on the anterior surface, remains exceptional. They may reveal themselves through unusual clinical or radiological presentation.

Observation: We report the case of a 13-year-old boy who presented with a progressive right shoulder deformity and lateral displacement of the scapula. Imaging revealed a large osteochondroma measuring 63 mm, arising from the anterior surface of the right scapula. The patient underwent complete en bloc resection of the lesion performed in the lateral decubitus position. The scapula, displaced laterally by the mass, was repositioned after excision. Postoperatively, a compressive Elastoplast dressing and shoulder sling immobilization for three weeks were applied. No physiotherapy was required, and spontaneous shoulder mobilization resumed gradually after immobilization. Histopathological analysis confirmed a benign osteochondroma. At nine-month follow-up, the patient showed complete functional recovery and resolution of the deformity.

Conclusion: Scapular osteochondromas are uncommon lesions that should be considered in the differential diagnosis of unexplained thoracic or scapular deformities, particularly in adolescents. Complete surgical excision usually provides excellent functional and cosmetic outcomes, with minimal risk of recurrence when resection is thorough.