Mondo Description Diaphyseal medullary stenosis with malignant fibrous histiocytoma is a very rare autosomal dominant bone dysplasia/cancer syndrome characterized clinically by bone infarctions, cortical growth abnormalities, pathological fractures, and development of bone sarcoma (malignant fibrous histiocytoma).

Uniprot Description An autosomal dominant bone dysplasia characterized by pathologic fractures due to abnormal cortical growth and diaphyseal medullary stenosis. The fractures heal poorly, and there is progressive bowing of the lower extremities. Some patients show a limb-girdle myopathy, with muscle weakness and atrophy. Approximately 35% of affected individuals develop an aggressive form of bone sarcoma consistent with malignant fibrous histiocytoma or osteosarcoma.