Segmental Erythema Multiforme-Like Drug Eruption by Aromatase Inhibitor Anastrozole – First Case Report and another Example of an Immunocompromised District

Anastrozole is a non-selective aromatase inhibitor for adjuvant breast cancer therapy in postmenopausal women. Cutaneous adverse events have been reported. We observed a 64-year-old female patient with a medical history of locally advanced breast cancer of her right breast that was treated with radiotherapy and adjuvant drug therapy with anastrozole. She developed a segmental bullous eruption limited to the cancer-affected breast. Cessation of the aromatase inhibitor and systemic therapy with prednisolone cleared the lesions completely. This is the first report of a segmental erythema multiforme like drug eruption by anastrozole and another example of the concept of the immunocompromised district of skin.