OSLAM syndrome (MONDO_0008139) is characterized by the association of osteosarcoma, limb anomalies (clinodactyly with brachymesophalangy, bilateral radioulnar synostosis and absence of one digital ray of the foot) and red cell macrocytosis without anemia. Also known as: osteosarcoma-limb anomalies-erythroid macrocytosis syndrome.