Dermatologic toxicities of anti-neoplastic immunotherapy in United States hospitalizations.

A major side effect of anti-neoplastic immunotherapy is the onset of dermatologic toxicities following the administration of several different immunotherapy drugs. We sought to assess the incidence and mortality of anti-neoplastic immunotherapy-associated dermatologic toxicities using a nationally representative sample of United States (US) adults. The National Inpatient Sample database was queried for encounters undergoing anti-neoplastic immunotherapy. Multiple logistic regression models were constructed to analyze incidence of dermatologic toxicity and associated mortality as well as calculate adjusted odds ratios (aOR) after controlling for age, race, sex, household income, and cancer type. Immunotherapy patients demonstrated greater odds of developing pruritus (aOR = 7.59; 95% CI 5.17-11.2; P < 0.001), rash (aOR = 2.81; 95% CI 2.00-3.94, P < 0.001), generalized (aOR = 5.32; 95% CI 3.35-8.43; P < 0.001) and localized (aOR = 2.67; 95% CI 1.01-7.05; P < 0.001) skin eruptions, and vitiligo (aOR = 13.3; 95% CI 5.15-34.4; P < 0.001) compared to patients who did not receive anti-neoplastic immunotherapy. There were no significant differences observed in incidence of non-scarring alopecia (P = 0.7), psoriasis (P = 0.094), and dermatitis (P = 0.9) between the two groups. Patients who underwent immunotherapy were more likely to develop dermatologic toxicity (aOR = 3.93; 95% CI 3.12-4.94; P < 0.001), however, no significant differences in mortality were observed. Patients undergoing anti-neoplastic immunotherapy have an increased risk of developing dermatologic toxicity compared to patients who did not receive anti-neoplastic immunotherapy.