Abstract
Typically noted as a painless mass near a joint, osteochondroma, also known as osteocartilaginous exostosis, is the most common benign osseous lesion, accounting for 10%-15% of all bone tumors. Presenting in the first two decades of life, in either pedunculated or sessile form, the defining characteristic is continuity of cortical and medullary space thought secondary to outgrowth of physeal cartilage during adolescents. These lesions can vary in size and occur on any bone, with most common locations including the knee (femur or tibia), ilium, and scapula. Growth ceases when the patient reaches skeletal maturity. Care should be taken to evaluate for concurrent deformity, leg length discrepancy, or presence of multiple masses such as lesions about the torso or extremities that is more consistent with the autosomal dominant condition of multiple hereditary exostosis