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Indolent CD4+ CAR T-Cell Lymphoma after Cilta-cel CAR T-Cell Therapy
Metin Ozdemirli1, Thomas M Loughney1, Emre Deniz1
1From the Departments of Pathology (M.O., J.J.C.) and Gastroenterology (T.M.L.), MedStar Georgetown University Hospital, and Lombardi Comprehensive Cancer Center, Georgetown University Medical Center (E.D., A.U.) - both in Washington, DC; the Genomic Testing Cooperative, Irvine, CA (M.A.); the National Institutes of Health, Bethesda, MD (S.P.); and Brigham and Women's Hospital (S.S.), the Jerome Lipper Multiple Myeloma Center, Dana-Farber Cancer Institute (K.C.A.), and Harvard Medical School (P.A.) - all in Boston.
Abstract:
Indolent CD4+ cytotoxic chimeric antigen receptor (CAR) T-cell lymphoma involving the small intestine was diagnosed in a patient who had previously received ciltacabtagene autoleucel (cilta-cel) CAR T-cell therapy for treatment of myeloma. Targeted messenger RNA sequencing revealed the presence of CAR gene product in tumor cells. Whole-genome sequencing of samples of tumor and peripheral blood identified a single lentiviral insertion site within the second intron of the SSU72 gene. In addition, numerous genetic alterations that may have contributed to malignant transformation were identified in the tumor sample. (Funded by MedStar Georgetown University Hospital.).
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