[Cutaneous reactions due to the use of epidermal growth factor receptor inhibitors: two case reports].

An increase in the expression of epidermal growth factor receptors (EGFR) is involved in the stimulation of tumor development. EGFR inhibitors have shown efficacy in the treatment of neoplasms of the head, neck, colon and lung. EGFR when inhibited can cause cutaneous reactions in more than 50% of the patients.