Osteomyelitis mimicking a primary bone tumor in a patient with pulmonary arteriovenous malformation and Osler-Weber-Rendu disease.

Extremity pain is a common presenting symptom seen by the practitioner; the etiology may be related to problems in the bone, joint, soft tissues, or neurovascular bundle. The differential diagnosis is extensive for each, with a careful history and physical exam narrowing the list. Imaging begins with plain radiographs, reserving CT and MRI for further work-up. We report an unusual presentation of osteomyelitis mimicking a bone tumor in a patient with Osler-Weber-Rendu disease.