Mechanistic interaction between pituitary tumor-transforming gene-binding factor (PBF/PTTG1IP) and NIS was investigated through NanoBiT, co-immunoprecipitation, immunofluorescent microscopy, subcellular localisation and RAIU assays utilising wild-type and CRISPR-Cas9 PBF knockout breast cancer cells. Here, SLC5A5 is linked to pituitary tumor.