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Osteoid Osteoma

An Uncommon Cause of Foot Pain

^* College of Podiatric Medicine and Surgery, Des Moines University, Des Moines, IA.

Corresponding author: Scot Freschi, DPM, College of Podiatric Medicine and Surgery, Des Moines University, 3200 Grand Ave, Des Moines, IA 50266.

Abstract

An osteoid osteoma located in the forefoot can be difficult to diagnose, and the diagnosis is frequently delayed. We present a clinical case of a patient with pain, erythema, and swelling of the left forefoot with no history of trauma. Although rarely seen in the metatarsal, osteoid osteoma should be included in the differential diagnosis of foot pain. Findings from radiographs, magnetic resonance images, and a detailed clinical history led to the diagnosis of osteoid osteoma of the left second metatarsal. The lesion was surgically excised using curettage. This process significantly weakened the lateral cortex of the metatarsal shaft. To correct this surgically induced stress riser, an external fixator was applied to provide stability, allow for callus distraction, and allow the patient to walk as early as possible. We review osteoid osteoma, including the classic clinical presentation and treatment associated with this benign bone tumor. (J Am Podiatr Med Assoc 97(5): 405–409, 2007)