The Journal of Bone and Joint Surgery 81:404-8 (1999)
© 1999 The Journal of Bone and Joint Surgery, Inc.
Symptomatic Osteochondroma of the Clavicle. A Report of Two Cases*
KIYOHISA OGAWA, M.D. ,
ATSUSHI YOSHIDA, M.D. and
MICHIMASA UI, M.D. , TOKYO, JAPAN
Investigation performed at the Department of Orthopaedic Surgery, School of Medicine, Keio University, Tokyo
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Introduction
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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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Case Reports
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CASE 1. A twenty-six-year-old man who worked as a clerk was seen in July 1995 because of a three-year history of pain in the left shoulder. The pain . . . [Full Text of this Article]

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