Clinical Challenge: A Rash on the Arms and Trunk of an Elderly Man

The patient is an 86-year-old man with a 4-decade history of skin rashes. The condition was first noted on his thigh and was diagnosed as eczema. Over time, the rash spread to his arms and trunk and is occasionally itchy. Examination revealed widespread hyperpigmentation. The skin was xerotic with some areas manifesting slight induration. Shoddy lymphadenopathy was noted of his ...