Abstract

Introduction: Osteochondroma usually presents as a solitary or multiple forms, former presents in cases of hereditary multiple exostosis. Solitary Osteochondroma is a benign tumor which occurs generally in children and adolescents. We present a solitary sessile Osteochondroma in an unusual location and size. Case Study: A 14 years old female adolescent noticed a painless swelling in her posterior upper aspect of left leg at the age of 10 years but did not consult any doctor for the same. She occasionally had discomfort in squatting, sitting cross leg and consulted an Orthopaedician after 4 years of occurrence of the swelling, where X-rays were taken. X-rays showed bony outgrowth from the posteromedial aspect of the proximal fibula. CT (Computed Tomography) scan showed irregular lobulated sessile based bony outgrowth from posteromedial aspect of proximal fibula. MRI (Magnetic Resonance Imaging) with contrast showed marrow edema within the tumor. En-block resection of tumor was done then histopathological examination confirmed the diagnosis as a benign exostosis. Postoperatively patient recovered uneventfully. Conclusion: Solitary occurrence of osteochondroma in an unusual location of bone and their early management is a debate, they can be resected once skeletal maturity is attained. It is not necessary that it needs urgent resection until and unless patient approaches with cosmetic deformity, discomfort and pressurising symptoms leading to neurovascular deficits.

Keywords: Osteochondroma; Exostosis; Bone tumor; Proximal fibula