Figure 1: Endoscopic views of the lesion in the left external auditory canal before (A) and after (B) induction chemotherapy involving the administration of S-1 for two weeks followed by surgery. A: An easily bleeding polypoid tumor had completely occluded the left EAC. B: After the induction chemotherapy, the tumor had markedly decreased in size, resulting in the erosion of the skin in the EAC.