Derm Dx: Crusting and scaling of the skin in a nursing home resident

Dermatological consultation is requested for a 78-year-old woman residing in a nursing home. According to the nursing staff at the home, her eruption has been worsening over the last few weeks despite topical and oral steroid therapy, and she continually scratches affected areas. The patient suffers from dementia and is taking multiple oral medications. Examination reveals marked crusting and scaling ...