Solitary diaphyseal exostosis of femur: case report of an uncommon presentation

Abstract

Osteochondroma is the most common benign bone tumor and often diagnosed as an incidental finding. Most are asymptomatic, however significant pain, and pressure symptoms warrant excision. Most common location of solitary exostosis is metaphysics around the knee. We are reporting a case of a 14-year-old boy who presented with a swelling over the anterior aspect just below the mid-thigh level on the right side. Characteristic radiological features of exostosis were documented on plain radiograph and magnetic resonance imaging. Growth was excised, and diagnosis of solitary exostosis arising from diaphyseal region was confirmed on histopathology examination. This case report documents the uncommon diaphyseal location of solitary exostosis in an adolescent. Symptomatic lesions warrant excision.