Onycholysis With the Appearance of a "Sunset" Secondary to Capecitabine

Capecitabine is an antineoplastic agent that is currently the only effective treatment for patients with advanced or metastatic breast cancer in whom anthracycline or taxoid treatment has failed. Dermatologic side effects have included hand-foot syndrome and one case of onycholysis. We report a case of onycholysis with appearance of a "sunset" induced by capecitabine.