FOLH1 and pachyonychia congenita: These studies reported enhanced PSMA expression in PC xenograft mouse models (i) upon androgen deprivation (6 days treatment) using 64Cu-J591 PET on day 7 (an antibody targeting the extracellular domain of PSMA) [4] and (ii) following orchiectomy or a 7-day regimen of apalutamide using 68Ga-PSMA11 PET on day 7 [5].