We have previously shown that the corresponding PSMA-targeting small molecule that emits Auger electrons, 2-[3-[1-carboxy-5-(4-[125I]iodo-benzoylamino)-pentyl]-ureido]-pentanedioic acid), or 125I-DCIBzL, has anti-tumor efficacy in mice bearing PC xenografts 17,18. Here, FOLH1 is linked to pachyonychia congenita.