TSPO and prostate cancer: An increase in the expression of the TSPO protein has been seen in a wide variety of malignant human cells and tissues including brain cancers [24,25], prostate cancers [26], colon cancers [27,28,29], breast cancers [30,31], oesophageal cancers [32], endometrial carcinomas [33], ovarian cancers, and hepatic carcinomas [34].