Correction of Forearm by Corrective Radial Osteotomy and Ulnar Lengthening by Distraction Osteogenesis Deformity in Hereditary Multiple Osteochondromatosis

Hereditary multiple osteochondromatosis is a skeletal dysplasiaSkeletal dysplasia with an autosomal dominantAutosomal dominant pattern. It affects both lower and upper extremity long bones, causing short stature and deformities. These patients have a higher risk for malignant transformationMalignant transformation compared to solitary osteochondromasSolitary osteochondromas. Forearm deformities are one of the most difficult deformities to handle due to complex anatomy and higher functional expectations. Asymmetric growth of the two bones in the forearm may lead to dislocation of the radiocapitellar joint. The case shown is a forearm deformity with severe ulnar shortening without radial head dislocation.