Thyroid Dysfunction,Recovery, and Prognosis in Melanoma Patients Treated with Immune Checkpoint Inhibitors: A Retrospective Review |
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| Affiliation: | 1. From the Departments of Endocrinology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.;2. Oncology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.;1. From the Temple University Hospital, Section of Endocrinology, Diabetes, and Metabolism, Philadelphia, Pennsylvania.;2. Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania.;3. Lewis Katz School of Medicine at Temple University, Department of Clinical Sciences, Philadelphia, Pennsylvania.;4. Lewis Katz School of Medicine at Temple University, Section of Endocrinology, Diabetes, and Metabolism, Philadelphia, Pennsylvania. |
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| Abstract: | Objective: To describe thyroid dysfunction, factors associated with thyroid recovery, and survival in melanoma patients treated with immune checkpoint inhibitors that developed thyroid immune-related adverse events (irAEs).Methods: This was a retrospective study in a tertiary center from 2010–2017. We reviewed the charts of patients with melanoma that developed thyroid dysfunction after checkpoint inhibitor therapy. Cases with thyroid irAEs were grouped by recovery of thyroid function at 1 year. We collected a timeline of thyroid function tests, medication exposure, and survival and compared variables between the groups. We studied survival in comparison to a matched group without thyroid dysfunction.Results: A total of 186 melanoma patients received checkpoint inhibitors, and 17 (9%) had thyroid irAEs. Median time to abnormal thyroid-stimulating hormone was 38 days and followed a pattern of thyroiditis. Seven of 17 had thyroid recovery. In the no-recovery group, free thyroxine (T4) was often above 2 ng/dL (5/10 in no recovery, 0/7 in recovery; P = .04). In the recovery group, irAE grade was significantly lower, with 7/7 grade 1 (P = .004). Exposure to glucocorticoids was associated with recovery (3/10 in no recovery, 6/7 in recovery; P = .049). There was no difference in overall survival between the thyroid dysfunction group and controls, or between those that received glucocorticoids or not.Conclusion: Certain aspects of thyroid irAEs may correlate with thyroid recovery, including grade 1 thyroid irAEs, exposure to glucocorticoids, and peak free T4 levels less than 2 ng/dL. Thyroid irAEs did not appear to be associated with change in survival nor did exposure to glucocorticoids.Abbreviations: ASCO = American Society of Clinical Oncology; CTLA-4 = cytotoxic T-lymphocyte–associated protein 4; irAE = immune-related adverse event; PD-1 = programmed cell death protein 1; T4 = thyroxine; TSH = thyroid-stimulating hormone |
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