Regarding carcinomas, we observed that the majority (71.6%) displayed NIS immunostaining, which is in accordance to the literature (13, 14, 17, 18, 19, 20, 21, 22, 23) (Table 4), but only a minority presented NIS in the basolateral membrane of tumor cells (5.7%). The gene discussed is SLC5A5; the disease is neoplasm.