{Reference Type}: Case Reports {Title}: Hereditary multiple exostoses with a giant osteochondroma degenerated into chondrosarcoma. {Author}: Masino F;Montatore M;Carpentiere R;Balbino M;Gifuni R;Fascia G;Guglielmi G; {Journal}: Radiol Case Rep {Volume}: 19 {Issue}: 8 {Year}: 2024 Aug 暂无{DOI}: 10.1016/j.radcr.2024.04.012 {Abstract}: We present a case of hereditary multiple exostoses with malignant transformation to chondrosarcoma in a woman complaining of enlargement and pain in the right thigh. Hereditary multiple exostoses is a rare genetic disorder characterized by multiple osteochondromas. Malignant transformation to chondrosarcoma of a pre-existing osteochondroma is a possible significant manifestation of this hereditary syndrome. Imaging modalities such as X-ray, Ultrasound, and computed tomography play a crucial role in the diagnosis and management of these patients, as described in this case.