Furthermore, GRPR has been shown to be overexpressed in a variety of malignancies [4,5,6,7,8,9,10] and is involved in a large array of pathophysiological conditions, such as associations with some neurochemical alterations in neurological disorders, the development of malignant neoplasms, and the proliferation of cancer cells in several cancer types [1,3,11,12,13]. Here, GRPR is linked to cancer.