TRPV6-binding peptides delivered a conjugated fluorescent label to TRPV6-rich xenografts of human ovarian cancer (SKOV-3) and prostate cancer (DU 145), and superparamagnetic nanoparticles to SKOV-3 tumours suggesting the diagnostic photo-imaging and MRI-imaging potential of this over-expressed channel 101. Here, TRPV6 is linked to Familial prostate cancer.