The rh-theranostic agent demonstrates similar in vitro behavior compared to the gold standards [177Lu]Lu-DOTA-TATE and SiFAlin-TATE, along with an exceptionally high tumor uptake (53.58 ± 5.51% ID/g for the radiofluorinated version) after 1 h post-injection in AR42J tumor-bearing mice, making it ideal for imaging. Moreover, clearance from normal tissues and considerable tumor retention (10.32 ± 7.04%ID/g) for [177Lu]Lu-TATE4 were observed at 24 p.i., suggesting good therapeutic applicability.
This case highlights the limited therapeutic efficacy of PRRT in RAIR-DTC, despite favorable imaging characteristics. It underscores the need for better patient selection and further research to clarify the role of PRRT in this population.