Epidermal growth factor receptor inhibitor-related skin toxicity: mechanisms, treatment, and its potential role as a predictive marker
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Updated: Jul 7, 2026

Validated Immunochemical Assay for Comprehensive Determination of the Human Epidermal Growth Factor Receptor 2 Released from and Bound to Cells
Published on: May 9, 2025
Diletta Bianchini1, Akali Jayanth, Yu Jo Chua
1Department of Medicine, Royal Marsden Hospital, Down's Road, Sutton, Surrey, SM2 5PT UK.
Abstract:
The human epidermal growth factor receptor (HER1/EGFR/ErbB1) signaling is aberrant and overexpressed in many solid malignancies making it an appealing target for biologic agents. Among the classes of drugs targeting EGFR are monoclonal antibodies and EGFR tyrosine kinase inhibitors, which have been shown effective and generally well tolerated in different clinical settings. The majority of patients treated with EGFR inhibitors (EGFRIs) develop specific dose-dependent skin toxicity. This side effect may lead to physical and psychosocial discomfort which can result in dose reduction or treatment interruption. The relationship between rash and clinical outcome has stimulated interest in this particular toxicity as a possible surrogate marker of efficacy in patients treated with targeted agents against EGFR. This review aims to summarize and update the current knowledge of the clinical presentation, predictive and prognostic value, and the management of EGFRI-related skin toxicity.
Insights
EGFR inhibitors effectively treat cancers but often cause skin toxicity. This review explores the presentation, management, and potential of this side effect as a marker for treatment effectiveness.
Area of Science:
- Oncology
- Dermatology
- Pharmacology
Background:
- Aberrant human epidermal growth factor receptor (HER1/EGFR/ErbB1) signaling is common in solid tumors.
- EGFR inhibitors (EGFRIs), including monoclonal antibodies and tyrosine kinase inhibitors, are key cancer therapies.
- EGFRIs are generally well-tolerated but frequently cause dose-dependent skin toxicities.
Purpose of the Study:
- To review the clinical presentation of EGFR inhibitor-related skin toxicity.
- To summarize the predictive and prognostic value of this toxicity.
- To outline management strategies for EGFR inhibitor-induced dermatologic adverse events.
Main Methods:
- Literature review of studies on EGFRIs and associated skin toxicities.
- Analysis of clinical data regarding the presentation and management of rash.
- Evaluation of research investigating the link between skin toxicity and treatment outcomes.
Main Results:
- EGFRIs are associated with specific, dose-dependent skin toxicities.
- Skin toxicity can lead to treatment modifications (dose reduction/interruption).
- A potential correlation exists between rash severity and treatment efficacy.
Conclusions:
- Understanding EGFR inhibitor-related skin toxicity is crucial for patient management.
- Skin toxicity may serve as a surrogate marker for treatment response.
- Effective management strategies are needed to mitigate discomfort and maintain treatment adherence.
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