IL13RA2 and melanoma: On the other hand, our data showed that substantial expression of IL13Rα2 was observed in various human melanoma tissues including metastatic malignant melanoma from the armpit (lymph node) (Fig. 1B), malignant melanoma from the thigh (Fig. 1C), cunnus (Fig. 1D), skin (Fig. 1E) and right sole (Fig. 1F).