A IIT Study of 177Lu-DOTA-SNA040

Eligible subjects should first undergo 68Ga-NODAGA-SNA014 PET/CT imaging. Patients with negative 68Ga-NODAGA-SNA014 tumor uptake will be discharged from the study after one week of follow-up for adverse events. Patients with positive 68Ga-NODAGA-SNA014 tumor uptake (SUVmax ≥10) will proceed to the subsequent 177Lu-DOTA-SNA040 dose escalation study (with at least a 2-day interval between 68Ga-NODAGA-SNA014 imaging and 177Lu-DOTA-SNA040 treatment). After completing the first cycle of dosing for DLT observation, subsequent 2-6 cycles of 177Lu-DOTA-SNA040 treatment may be administered. For dose group 1, the subsequent 2-6 cycles of 177Lu-DOTA-SNA040 dosing activity will be determined by the investigator, with the dose per cycle adjustable. For dose groups 2-4, the 177Lu-DOTA-SNA040 dosing activity will follow the fixed original dose (e.g., the first cycle dose for dose group 2 is 100 mCi, with subsequent 2-6 cycles fixed at 100 mCi).