Unusual solid mass in the popliteal fossa

Abstract

We present a clinical case image of a 20-year-old man with a lump behind his knee. A radiograph taken in the emergency department demonstrated the classical appearance of an osteochondroma. Osteochondroma is the commonest skeletal neoplasm. Surgical excision results in symptom resolution in over 90% of patients. Copyright 2013 BMJ Publishing Group. All rights reserved.