A man in his 60s presented for further evaluation of a right inguinal and scrotal lesion ( Figure 1). The rash initially started 4 years prior as a dime-sized, pink, scaly area in the right inguinal crease and was pruritic. Results of a biopsy at the time were consistent with lichen simplex chronicus, and treatment with topical steroids was initiated. Since then, the rash had failed to resolve and the affected area had increased in size to its present dimensions. The patient had a history of prostate cancer treated with prostatectomy 4 years previously without evidence of recurrence and melanoma of the posterior neck treated with wide local excision, in addition to non-insulindependent diabetes mellitus and hyperlipidemia controlled with oral medications. He does not smoke and has been in a monogamous marriage for more than 30 years. Examination revealed a multifocal scaly, pink-red beefy plaque in the right inguinal crease extending from the superior aspect of the scrotum to the gluteal crease measuring approximately 6 × 7 cm in total area with some areas of excoriation and superficial open wounds. An additional area of macular erythema extended superiorly along the inguinal crease toward the medial thigh. No lymphadenopathy of the inguinal region was noted.Quiz at jamaoncology.com Figure 1. Clinical photograph of a right inguinal and scrotal lesion.