• Bernardo Leon Rapoport, Ronwyn van Eeden, Vincent Sibaud, Joel B Epstein, Jean Klastersky, Matti Aapro, and Devan Moodley.
• The Medical Oncology Centre of Rosebank, 129 Oxford Road, Saxonwold 2196, Johannesburg, South Africa. brapoport@rosebankoncology.co.za.
• Support Care Cancer. 2017 Oct 1; 25 (10): 3017-3030.

AbstractImmune checkpoint inhibitors, a new class of cancer therapeutic agents, play an important role in the management of melanoma, NSCLC, and other malignancies. A workshop organized by three MASCC Study Groups: Oral Care, Skin Toxicities, and Neutropenia, Infection, and Myelosuppression during the MASCC Annual Meeting held in Adelaide, Australia on 23-25 June, 2016 focused on the new class of anti-cancer therapeutic agents. Topics in the workshop included the mechanism of action and clinical uses of immune anti-CTL4 and anti-PD1 antibodies, checkpoint inhibitor toxicities, including skin adverse events, gastrointestinal toxicities, oral complications, pulmonary toxicities, and endocrinological and immune-related infections. Checkpoint inhibitors have been approved for use in different malignancies including metastatic melanoma, advanced non-small cell lung cancer, metastatic renal cell carcinoma, refractory Hodgkin's lymphoma, metastatic bladder cancer, and advanced head and neck cancer, and the list continues to grow. In general, these agents seem to be better tolerated in most patients and less toxic compared to conventional chemotherapy. However, the toxicities here, termed immune-related adverse events (irAEs), are unique and different from what we have seen in the past. There is no prospective data on these toxicities, and guidelines or recommendations are currently based on symptomatic management from the ongoing clinical trials. Treating oncologists need to be aware and alert themselves to the subtleties in presentation and the big difference in the way we manage the irAEs. Although most irAEs are low-grade and manageable, they have the potential to be life-threatening and extremely severe if not promptly treated. Additionally, irAEs could even lead to death, if managed incorrectly. The MASCC workshop addressed the various irAEs, per organ system, clinical presentation, management recommendations, and individual toxicities.

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