EGFR and glioblastoma: Similarly, elevated exosomal occurrence of epidermal growth factor receptor (EGFR) during glioblastoma, glypican-1 at an early stage of pancreatic cancer and retinoic acid-induced protein 3, resistin etc., during bladder cancer are some of the best examples of exosome derived markers for the specific type of cancers [49,133,134].