Peptide receptor radionuclide therapy with 177Lu-DOTA-octreotate: dosimetry, nephrotoxicity, and the effect of hematological toxicity on survival

Objectives Peptide receptor radionuclide therapy (PRRT) with lutetium-177 (177Lu)-DOTATATE is regarded as a safe treatment option with promising results for patients with neuroendocrine neoplasia (NEN). We aimed to study the absorbed organ and tumor doses, the renal and hematological toxicity as well as their mutual interaction. Another aim was the identification of adverse effects as possible predictors which may affect survival. Methods A total of 30 (14 female and 16 male) patients with inoperable/metastatic NEN were treated with 7.4 GBq of 177Lu-DOTATATE. Occurrence of renal and hematological toxicity wasretrospectively studied. Morever, we examined the effects of hematological toxicity on survival after 177Lu-DOTATATE-PRRT. Results In 49 treatment cycles, the mean absorbed dose to the kidneys was 5.13±2.12, 4.49±2.49 Gy to the liver, and 14.44±8.97 Gy to the spleen, whereas tumor lesions absorbed a mean dose of 31.43±36.86 Gy. Comparing different localizations of metastases, no significant differences in absorbed dose were observed. Clinical response status revealed regressive disease in 47.6%, stable disease in 38.1%, and progressive disease in 14.3% of cases (n=21). Biochemically, 81.3% of patients showed reduced serotonin values (n=16; P
Source: Nuclear Medicine Communications - Category: Nuclear Medicine Tags: Original Articles Source Type: research