An interesting case study of schwannomatosis (a rare genetic disorder that results in multiple schwannomas) displayed two significant, unusual features: (1) Stimulating prostate-specific antigen secretion from the prostate (which cannot be inhibited by dutasteride) and (2) arousing a distant cognate schwannoma tumor after the resection of the initial large schwannoma [140]. This evidence concerns the gene KLK3 and schwannoma.