London Bone and Soft Tissue Tumour Service, Middlesex Hospital, University College London Hospitals NHS Trust, London W1N 8AA.
An osteoid osteoma is a benign bone tumour which can cause severe pain. Diagnosis is often delayed, as it may mimic other musculoskeletal conditions. The most pertinent investigations for diagnosis are a bone scan and computed tomography of the area of increased uptake. Treatment with minimally invasive techniques allows early return to full function.