LRRC32 and neoplasm: We demonstrate here by immunostaining and cytometry that total GARP expression within the tumour is relatively low (<5 %), suggesting a low proportion of active targeting masked by passive targeting, which may explain why there was no difference in efficacy on tumour growth between the [177Lu]Lu-DOTAGA-GARP probe and the [177Lu]Lu-DOTAGA-Ig irrelevant probe.