Those in ALT or Tel-positive groups, which have a poorer prognosis, have an increased incidence of the more aggressive liposarcoma subtypes, dedifferentiated or usual myxoid and round-cell myxoid subtypes, respectively, while the well-differentiated tumours were the most abundant subtype within the ALT−/Tel− group, which has the best prognosis (summarised in Table 3). The gene discussed is ETV6; the disease is liposarcoma.