Immune-related Neutropenia Following Treatment With Immune Checkpoint Inhibitors

The existing data with regard to immune-related neutropenia (irN), a rare (incidence—1%) immune-related adverse event of immune checkpoint inhibitors, are scarce. Eight patients with irN were identified through internal databases of 3 participating Israeli cancer centers. In addition, 11 original articles focusing on the clinical course of 24 patients with irN were selected during the PubMed search. Descriptive analysis of clinical and pathologic factors related to irN was performed (n=32); the effect of these on the irN outcomes was assessed. An algorithm for irN evaluation and treatment was proposed. The median time-to-onset of irN (n=32) was 60 days (range, 10–465 d). Grade 3–5 irN, febrile neutropenia, and irN-related death occurred in 81%, 50%, and 9% of patients, respectively. In all, 56%, 22%, 62%, and 25% of patients received PO corticosteroids, IV corticosteroids, granulocyte colony–stimulating factor (GCSF), and intravenous immunoglobulins (IVIG), respectively, with an improvement/resolution rate of 84%. Odds ratios for irN improvement/resolution were as follows: 1.40 [95% confidence interval (CI), 0.03–68.72], 0.43 (95% CI, 0.04–4.22), 2.60 (95% CI, 0.07–97.24), 0.36 (95% CI, 0.03–4.38), 4.02 (95% CI, 0.16–99.48), 2.01 (95% CI, 0.32–12.70), 1.08 (95% CI, 0.02–49.89), 0.42 (95% CI, 0.06–2.91), and 2.73 (95% CI, 0.42–17.51) for granulocyte hyperplasia, granulocyte/all lineage hypopla...
Source: Journal of Immunotherapy - Category: Allergy & Immunology Tags: Clinical Studies Source Type: research

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