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Fangwen Zou, Hamzah Abu-Sbeih, Weijie Ma, Yuanzun Peng, Wei Qiao, Jianbo Wang, Amishi Y. Shah, Isabella C. Glitza Oliva, Sarina A. Piha-Paul, John A. Thompson, Hao Chi Zhang, Anusha S. Thomas and Yinghong Wang

Background: Immune-mediated diarrhea and colitis (IMDC) is a common immune-related adverse effect related to immune checkpoint inhibitors. We aimed to identify risk factors for chronic IMDC and its prognostic value in cancer outcomes. Methods: We retrospectively collected data on patients with a diagnosis of IMDC between January 2018 and October 2019 and grouped them based on disease duration into acute (≤3 months) and chronic (>3 months) categories. A logistic regression model and the Kaplan-Meier method with log-rank tests were used for biostatistical analysis. Results: In our sample of 88 patients, 43 were in the chronic group and 45 were in the acute group. Genitourinary cancer and melanoma accounted for 70% of malignancies. PD-1/L1 monotherapy (52%) was the more frequently used regimen. We showed that chronic IMDC was associated with proton pump inhibitor use (odds ratio [OR], 3.96; P=.026), long duration of IMDC symptoms (OR, 1.05; P<.001) and hospitalization (OR, 1.07; P=.043), a histologic feature of chronic active colitis (OR, 4.8; P=.025) or microscopic colitis (OR, 5.0; P=.045), and delayed introduction of selective immunosuppressive therapy (infliximab/vedolizumab; OR, 1.06; P=.047). Chronic IMDC also reflected a better cancer response to immune checkpoint inhibitors (30% vs 51%; P=.002) and was accompanied by improved overall survival (P=.035). Similarly, higher doses of selective immunosuppressive therapy were associated with better overall survival (P=.018). Conclusions: Chronic IMDC can develop among patients with a more aggressive disease course and chronic features on colon histology. It likely reflects a prolonged immune checkpoint inhibitor effect and is associated with better cancer outcome and overall survival.

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John A. Thompson, Bryan J. Schneider, Julie Brahmer, Stephanie Andrews, Philippe Armand, Shailender Bhatia, Lihua E. Budde, Luciano Costa, Marianne Davies, David Dunnington, Marc S. Ernstoff, Matthew Frigault, Brianna Hoffner, Christopher J. Hoimes, Mario Lacouture, Frederick Locke, Matthew Lunning, Nisha A. Mohindra, Jarushka Naidoo, Anthony J. Olszanski, Olalekan Oluwole, Sandip P. Patel, Sunil Reddy, Mabel Ryder, Bianca Santomasso, Scott Shofer, Jeffrey A. Sosman, Momen Wahidi, Yinghong Wang, Alyse Johnson-Chilla and Jillian L. Scavone

The aim of the NCCN Guidelines for Management of Immunotherapy-Related Toxicities is to provide guidance on the management of immune-related adverse events resulting from cancer immunotherapy. The NCCN Management of Immunotherapy-Related Toxicities Panel is an interdisciplinary group of representatives from NCCN Member Institutions and ASCO, consisting of medical and hematologic oncologists with expertise in a wide array of disease sites, and experts from the fields of dermatology, gastroenterology, neuro-oncology, nephrology, emergency medicine, cardiology, oncology nursing, and patient advocacy. Several panel representatives are members of the Society for Immunotherapy of Cancer (SITC). The initial version of the NCCN Guidelines was designed in general alignment with recommendations published by ASCO and SITC. The content featured in this issue is an excerpt of the recommendations for managing toxicity related to immune checkpoint blockade and a review of existing evidence. For the full version of the NCCN Guidelines, including recommendations for managing toxicities related to chimeric antigen receptor T-cell therapy, visit NCCN.org.

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John A. Thompson, Bryan J. Schneider, Julie Brahmer, Stephanie Andrews, Philippe Armand, Shailender Bhatia, Lihua E. Budde, Luciano Costa, Marianne Davies, David Dunnington, Marc S. Ernstoff, Matthew Frigault, Benjamin H. Kaffenberger, Matthew Lunning, Suzanne McGettigan, Jordan McPherson, Nisha A. Mohindra, Jarushka Naidoo, Anthony J. Olszanski, Olalekan Oluwole, Sandip P. Patel, Nathan Pennell, Sunil Reddy, Mabel Ryder, Bianca Santomasso, Scott Shofer, Jeffrey A. Sosman, Yinghong Wang, Ryan M. Weight, Alyse Johnson-Chilla, Griselda Zuccarino-Catania and Anita Engh

The NCCN Guidelines for Management of Immunotherapy-Related Toxicities provide interdisciplinary guidance on the management of immune-related adverse events (irAEs) resulting from cancer immunotherapy. These NCCN Guidelines Insights describe symptoms that may be caused by an irAE and should trigger further investigation, and summarize the NCCN Management of Immunotherapy-Related Toxicities Panel discussions for the 2020 update to the guidelines regarding immune checkpoint inhibitor–related diarrhea/colitis and cardiovascular irAEs.