EGFR Inhibitor-associated Rash

The goal of this randomized clinical trial is to learn if topical treatment with ATR04-484 can treat skin rash in patients undergoing EGFR inhibitor (EGFRi) therapy. The primary goal of the study is to determine safety and tolerability of ATR04-484, and the secondary goal of the study is to assess efficacy signals of ATR04-484. Researchers will compare treatment of ATR04-484 to its vehicle. Participants will: * Apply ATR04-484 or vehicle daily for 28 days * Visit the clinic periodically for evaluation and sample collection

A Phase II, multicentric, randomized, double-blind, placebo-controlled, parallel- group trial to confirm the good safaty profile and to explore the preventive effect of topically applied TAR-0520 gel on folliculitis developed in metastatic colorectal cancer (mCRC) patients treated with monoclonal anti-EGFR antibodies.