FOLH1 and melanoma: Apart from its known strong expression in prostatic epithelium and prostate cancer cells, PSMA is expressed in the tumor neovasculature of different tumor types, including renal cell carcinomas, bladder carcinoma, colonic adenocarcinomas, glioblastoma multiforme, lung cancers, malignant melanomas and soft tissue tumors [12–14, 21–23].