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Quality of life impact in patients with cutaneous toxicities caused by EGFR inhibitors and immunotherapy.

BACKGROUND: novel oncologic therapies, including epidermal growth factor receptor inhibitors (EGFR-Is) and immune checkpoint inhibitors (ICIs), are associated with a new spectrum of adverse reactions, with prominent cutaneous toxicities. The impact of cutaneous adverse events (cAEs) on patients' quality of life (QoL) represents an unmet clinical need.

OBJECTIVES: 1) to assess whether cutaneous toxicities directed therapies are effective in reducing the QoL burden via the submission of two patient reported outcome measures (PROMs); 2) to investigate whether class of oncologic therapy, type of cAE and toxicity severity differently impact on patients' QoL.

METHODS: a prospective observational study was conducted at the Dermatology department of the Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy, from October 2018 to October 2019. Patients aged ≥ 18 years, under therapy with EGFR-Is or ICIs and experiencing a treatment-related cAE were eligible for the study. Dermatology Life Quality Index (DLQI) and European Organization for Research and Treatment of Cancer Quality of Life Questionnaire- Core 30 version 3.0 (EORTC QLQ-C30) were administered to patients at first clinical visit (T0), at 1-month (T1), and at 3-month (T2) dermatological follow-up.

RESULTS: Sixty cAEs of 51 patients have been recorded. A significant difference in the mean score for both DLQI and EORTC QLQ-C30 was found along the 3-months dermatological follow-up (p <0.0001). A similar QoL improvement was reported for PROMs stratified by class of therapy and toxicity severity (p <0.0001). No difference was reported for patients with pyogenic granuloma-like lesions and psoriasiform eruption as per DLQI. Class of therapy and toxicity severity did not differently impact on patients' QoL at selected timepoints; we reported a higher EORTC QLQ-C30 score at T2 for patients developing psoriasiform eruption compared to other types of cAEs.

CONCLUSIONS: Early patients' referral to dermatologists and tailored management could result in better QoL.

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