Lu-177-DOTATATE (Lutathera) in Combination With Olaparib in Inoperable Gastroenteropancreatico Neuroendocrine Tumors (GEP-NET)

Lu-177-DOTATATE will be given by IV every 8 (+/-2) weeks for a total of 4 administrations

Olaparib is given as a pill taken orally and is to be taken twice a day, starting from 2 days before the first administration of Lu-177-DOTATATE until 4 weeks after the last administration

Ga68-DOTATATE PET/CT scan will be done at baseline, at week 32, then every 24 weeks in followup period.

F18-FDG PET/CT scan will be done at baseline, at week 32, then every 24 weeks in followup period.

Concomitant administration of an IV infusion of an amino acid (AA) solution will also be done for renal protection. The AA infusion will begin at least 30-60 minutes prior to injection of Lu-177-DOTATATE and will continue during and after the Lutathera infusion until the entire prescribed amount is infused.