Abstract

The incidence of gastroenteropancreatic neuroendocrine tumors has been rising and these tumors are usually only diagnosed at a metastatic stage. Present first line treatments include somatostatin analogs, targeted therapies and peptide receptor radionuclide therapy. The Lutetium-177 [177Lu] based radiotracer [177Lu]Lu-DOTATATE has only been approved as first-line treatment of metastatic midgut NETs however its efficacy as a third line or above treatment in patients with non ileal primaries has not been tested. In our study, we identified 25 patients with histologically confirmed well-differentiated metastatic neuroendocrine tumors and administered [177Lu]Lu-DOTATATE as a second line, third line and fourth line treatment. Our study demonstrated a notable response in patients with non-ileal primaries and heavily pretreated disease, warranting further studies for additional cycles of treatment.

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