RecruitingPhase 2Drug trialTopical Tretinoin Prophylaxis for Anti-EGFR Induced Skin Toxicity in Patients With Solid TumorsThe goal of this clinical trial is to learn if using topical tretinoin will help patients with solid tumors who are experiencing an acneiform rash as a side effect of their treatment. Researchers will compare the use of tretinoin on one side of the face to the use of a placebo on the other side of the face to see if there is an impact.