Abstract

Background: The management of locally advanced head and neck cancer remains a challenge to most oncologists and their patients. Treatment with epithelial growth factor receptor inhibitors (EGFRIs) is associated with a good response. Cetuximab, a chimeric monoclonal antibody directed against epithelial growth factor receptor (EGFR), in combination with radiation therapy is indicated for the treatment of locally advanced squamous cell carcinoma of the head and neck. Although a mild acneiform skin rash (Grade 1, 2) is very common in these patients, severe rash (Grade 3) is uncommon.Case report: A 61-year-old African American man with locally advanced oropharyngeal cancer was treated with cetuximab and radiation. He developed a sudden flare-up of a skin rash after the 5th cycle of cetuximab following use of over-the-counter (OTC) skin care remedies. The rash manifested with severe maculopapular eruption and erythematous rash, along with desquamation and exfoliation of the skin, mainly on the face and neck area. The patient denied any extraordinary sun exposure. Cetuximab and radiation therapy were held for 1 week and the rash was treated with doxycycline, diphenhydramine, and continued use of natural emollient (Vaseline petroleum jelly). After 1 week, a dramatic improvement of the facial rash was noticed.Discussion: Our report describes a sudden flare-up of a skin rash (Grade 3) after the 5th cycle of cetuximab following use of OTC skin care remedies, which was unusual for this patient, suggesting a possible relation to the therapy. Skin crucially depends on EGFR for its normal function and becomes extremely sensitive during cetuximab therapy. Topical OTC acne and dry skin remedies can suddenly change the mild acneiform rash into severe skin toxicity associated with marked desquamation and exfoliation. Avoidance of further skin damage caused by topical applications and the use of doxycycline and diphenhydramine show a significant success in the management of skin toxicity.

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