RESUMO
Enchondromatoses include a heterogeneous group of congenital syndromes characterized by the presence of multiple enchondromas associated with musculo-skeletal malformations secondary to limb shortening, scoliosis, pathological fractures and pseudoarthrosis. The main complication of enchondromas is their malignant transformation to secondary chondrosarcomas, which may occur in up to 25% of cases. The multiple enchondromatosis syndromes have many clinical similarities and the differential diagnosis is therefore difficult to make. We present the clinical case of a 38-year-old patient with a diagnosis of multiple familial enchondromatosis who developed a pelvic chondrosarcoma that was treated with external hemipelvectomy. We reviewed the literature concerning the specific aspects of Mafucci, Oilier and multiple familial enchondromatosis syndromes.