A patient undergoing chemotherapy for breast cancer presents with a dry, red, cracking rash at the corners of her mouth. What is the potential diagnosis, and what would be the appropriate treatment?
This patient likely has angular cheilitis, also known as perleche, which can be caused by Candida infection. This condition is more common in people with weakened immune systems, such as those undergoing chemotherapy. Topical antifungal creams are typically effective in treating this condition.