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Symptomatic Osteochondroma of the Clavicle. A Report of Two Cases*
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Investigation performed at the Department of Orthopaedic Surgery, School of Medicine, Keio University, Tokyo
J Bone Joint Surg Am, 1999 Mar 01;81(3):404-8
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An osteochondroma is a benign lesion that is often considered to be the most common type of bone tumor; however, it is actually a developmental physeal growth defect19. A solitary osteochondroma is encountered more frequently than are multiple hereditary osteochondromas18,25. This defect may develop in any bone in which endochondral ossification occurs, but the principal locations are the long bones, especially the femur, the humerus, and the tibia18,25. The lesion rarely occurs in the clavicle. Although it typically presents as an asymptomatic slow-growing osseous mass, symptoms resulting from various causes may occur after local expansion4,5,8,9,13,18,23,25,26. We report the cases of two patients who had a painful solitary osteochondroma that was located at the lateral end of the clavicle.
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    These activities have been planned and implemented in accordance with the Essential Areas and policies of the Accreditation Council for Continuing Medical Education (ACCME) through the joint sponsorship of the American Academy of Orthopaedic Surgeons and The Journal of Bone and Joint Surgery, Inc. The American Academy of Orthopaedic Surgeons is accredited by the ACCME to provide continuing medical education for physicians.
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