Additionally, in LRRC15- s.c. LNCaP tumors, which lack relevant amounts of murine LRRC15 expressing stroma but are highly vascularized, systemic injection of [177Lu]Lu-DUNP19 resulted in tumor retention of 6.97 ± 1.3%IA/g at 48 h p.i. (Fig. 2b). Here, LRRC15 is linked to neoplasm.