The YAP1:TFE3-fused gene and WWTR1(TAZ)-CAMTA1 gene fusions are characteristic of haemangioendothelioma, whereas the presence of FUS:DDIT3 or EWSR1:DDIT3 genes is pathognomonic in myxoid liposarcoma (MLPS), a malignant tumour, recapitulating lipogenesis [17,18,19]. The gene discussed is DDIT3; the disease is cancer.