A multidisciplinary immune-related toxicity (IR-Tox) program for immune-related adverse events: A two-year experience.

e15074 Background: Immune checkpoint inhibitors (ICIs) cause immune-related adverse events (irAEs) that may require multidisciplinary input. We developed an IR-Tox program consisting of an electronic irAE referral platform +/- in-person consultation, and a monthly irAE tumor board, run by an IR-Tox team comprising 38 organ-specialists and oncologists. Herein, we present our 2-year experience. Methods: Electronic referrals for patients (pts) treated with ICIs at an academic center were sent to the IR-Tox team between 08/2017-12/2019. Demographic, treatment, and irAE data, including in-person consultations and hospitalizations, were collected in an IRB-approved database. Results: The IR-Tox Team received 270 referrals from 227 discrete pts (outpt: 64% inpt: 36%). Median age was 63 years (range: 3-91), 52% were male, 23% had a prior autoimmune condition, and 28% had a prior irAE. Pts had thoracic (30%), gastrointestinal (18%) or melanoma/skin cancers (17%). The majority of pts received ICI monotherapy (56%) vs. combination (44%). Referrals were for suspected irAE (92%, 209/227) or pre-ICI assessment for known autoimmune disease (8%, 18/227). Referrals for confirmed irAEs (147/209) were mainly for high-grade toxicity (G1 = 8%, 2 = 37%, 3 = 54%), 49% were hospitalized (72/147), and 86% (127/147) improved/resolved. In those who did not have a confirmed irAE (n = 62), an alternative medical condition was the most frequent diagnosis (27%, 17/62). The most common irAEs were pneumonitis (51%), dermatitis (11%), arthritis (7%), hepatitis (6%), and colitis (5%). In the entire cohort, organ-specialists were consulted electronically in 92% of pts (209/227), and 73% were subsequently seen in-person (166/227), with the majority (90/166; 54%) undergoing an invasive diagnostic procedure to confirm the irAE. Of outpatients referred, 64% (94/146) required subsequent in-person consults from organ-specialists and only 12% (18/146) were hospitalized. After all irAE-hospitalizations, continued irAE management was delivered in conjunction with organ-specialists in 51% of cases (32/72). Conclusions: A multidisciplinary IR-Tox program is a utilized service that has assisted in irAE identification and management over 2+ years. Use of an electronic referral platform may impact subsequent need for in-person specialist consultations and/or hospitalizations for irAEs. Ongoing management of complex irAEs is now commonly delivered in a multidisciplinary fashion.