Long-Term Hematotoxicity After Peptide Receptor Radionuclide Therapy with 177Lu-Octreotate

医学 放射性核素治疗 不良事件通用术语标准 累积发病率 细胞减少 内科学 白细胞减少症 累积剂量 不利影响 队列 神经内分泌肿瘤 毒性 核医学 胃肠病学 外科 骨髓
作者
Amir Sabet,Khaled Ezziddin,Ulrich‐Frank Pape,Hojjat Ahmadzadehfar,Karin Mayer,Thorsten Pöppel,Stefan Guhlke,Hans‐Jürgen Biersack,Samer Ezziddin
出处
期刊:The Journal of Nuclear Medicine [Society of Nuclear Medicine and Molecular Imaging]
卷期号:54 (11): 1857-1861 被引量:146
标识
DOI:10.2967/jnumed.112.119347
摘要

Myelosuppression may be the dose-limiting toxicity in peptide receptor radionuclide therapy (PRRT). The aim of this study was to investigate the incidence, severity, and reversibility of long-term hematotoxicity in a large cohort of patient undergoing PRRT with (177)Lu-octreotate for metastatic neuroendocrine tumors. The impact of potential risk factors, including initial cytopenia, advanced bone metastatic disease, previous chemotherapy, and cumulative administered activity, and the protective effects of splenectomy were of particular interest.A total of 632 PRRT courses were performed in 203 patients with metastatic neuroendocrine tumors. A mean activity of 7.9 GBq of (177)Lu-octreotate was administered per treatment cycle, with a goal of 4 courses at standard intervals of 3 mo. Hematologic parameters were determined before each treatment course, at 2- to 4-wk intervals between the courses, 8-12 wk after the last course of PRRT, and at 3-month intervals for further follow-up. Toxicity was recorded with Common Terminology Criteria for Adverse Events (version 3.0).Myelodysplastic syndrome as a delayed adverse event was documented in 3 patients (1.4%). Relevant but reversible hematotoxicity (grade 3 or 4) occurred in 23 patients (11.3%) and 29 administrations (4.6%), with leukopenia in 2.7% and thrombocytopenia in 1.7%. The mean time to blood count recovery was 12 mo after the termination of PRRT (range, 3-22 mo). The only preexisting factor that contributed to hematotoxicity was initial cytopenia (P < 0.001). A high level of cumulative administered activity (>29.6 GBq) was associated with relevant leukopenia (P < 0.001). None of the patients with a history of splenectomy developed grade 3 or 4 hematotoxicity, and splenectomy was inversely associated with the incidence and degree of leukopenia (P = 0.02) and thrombocytopenia (P = 0.03).PRRT-induced myelosuppression is almost invariably reversible and rarely requires clinical measures. Administered activity and initial cytopenia are the only factors contributing to myelosuppression, whereas splenectomy may exert a protective effect.
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