CD19‐directed chimeric antigen receptor (CAR) T‐cell therapy has had a dramatic impact on the natural history and survival of patients with high‐risk B‐cell non‐Hodgkin lymphoma. Accompanying this success has been the development of new fields of medicine and investigation into toxicity risks and mitigation therapies, mechanisms of resistance and the development of novel and next generation products and strategies in order to address relapse, and issues related to global access and health care economics. This article is a survey of each of these areas as it pertains to the rapidly evolving field of CAR T‐cell therapy, written by an International community of lymphoma experts, who also happen to be women.

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PURPOSE: Prompt recognition of acute chimeric antigen receptor T (CAR T)-cell–mediated toxicities is crucial because adequate and timely management can prevent or reverse potential life-threatening complications. In the outpatient setting, patients and informal caregivers have to recognize and report signs and symptoms marking these acute toxicities. This study provides a core set of patient- and caregiver-reported signs and symptoms (outcomes, P/CROs) and definitions of red flags warranting immediate action to include in a daily checklist for support at home, with the goal to make outpatient post–CAR T-cell care safer, optimize patient and caregiver support, and thereby facilitating an early discharge/hospital visit reduction strategy. METHODS: We performed a systematic review of phase II/III trials of US Food and Drug Administration–approved CAR T-cell products and selected all common and severe adverse events that could be translated into a P/CRO for inclusion in a two-round modified Delphi procedure. Eleven CAR T-cell–dedicated hematologists from the Dutch CAR T-cell tumorboard representing all treating centers selected P/CROs for inclusion in the core set and defined red flags. The final core set was evaluated with patients and caregivers. RESULTS: From nine clinical trials, 457 adverse events were identified of which 42 could be used as P/CRO. The final core set contains 28 items, including five signs for measurement via wearables and two signs for caregiver-performed assessments. CONCLUSION: This study provides a core set of P/CROs that can serve as a framework for (eHealth) tools that aim to enable patients and caregivers to more effectively recognize and report signs and symptoms of acute toxicities after CAR T-cell therapy, which will enhance safe outpatient treatment monitoring.

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