Musculoskeletal Key

CLINICAL SUMMARY Osteochondromas are disorders of physeal bone growth in which histologically normal bone grows transversely away from the center of the growth plate. The large majority of patients with…

Campanacci Disease, Cortical Osteofibrous Dysplasia, Ossifying Fibroma CLINICAL SUMMARY Osteofibrous dysplasia is a distinctive intracortical lesion almost always seen in the anterior tibial cortex. Histologically, it resembles fibrous dysplasia. Small…

CLINICAL SUMMARY Chondromyxoid fibroma is a rare benign bone tumor with a predilection for the metaphysis of long bones and a distinctive histologic appearance. Curettage is adequate for most cases….

Eosinophilic Granuloma, Histiocytosis X CLINICAL SUMMARY Langerhans cell histiocytosis presents as a painful lytic bone lesion in children. It is most commonly monostotic, in which case it is also termed…

Codman Tumor CLINICAL SUMMARY Chondroblastoma is an uncommon bone tumor, found almost exclusively in the epiphysis of long bones or epiphyseal equivalents, such as an apophysis or the patella. Diagnosis…

Simple Bone Cyst CLINICAL SUMMARY Unicameral bone cysts are most common in children and adolescents and are thought to result from transient failure of the physeal cartilage to ossify. They…

Fibroxanthoma, Metaphyseal Fibrous Defect CLINICAL SUMMARY Nonossifying fibromas are most commonly discovered incidentally near the ends of growing bones in children and adolescents. Most lesions spontaneously ossify by skeletal maturity,…