Presentation
Right leg swelling with chronic pain.
Patient Data
Age: 16 years
Gender: Male
From the case:
Diaphyseal aclasia
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Multiple bony exostoses of different sizes in the proximal tibia and fibula and distal tibial metaphysis consistent with diaphyseal aclasia. No soft tissue mass.
Case Discussion
Multiple osteochondromas (known as diaphyseal aclasia) is a rare autosomal disorder characterized by multiple bone exostosis mainly affecting the long bones with resultant deformities. It also involves the ribs and scapula. There is a 5% increase in the risk of malignancy in the cartilaginous cap (chondrosarcoma).