A 72-year-old man self-refers to dermatology at the insistence of his wife, who wants confirmation of her assertion that he needs to use a moisturizer on his arms. “They’re just so dry!” she says. “They’d look so much better if he’d use moisturizer every day, like I do.”
Her husband says he tried it and it didn’t help, so he stopped. “Besides, I can’t stand the greasy feeling it leaves behind!”
The patient claims to be in decent health aside from mild arthritis. He is retired from his job with the local power company, which kept him outdoors for many years. His employer required workers to wear long-sleeved khaki shirts, but, like all his fellow employees, the patient rolled up the sleeves in hot weather, exposing his forearms.
EXAMINATION
The patient has type II skin, blue eyes, and light brown hair. The skin on the dorsa of both arms is flecked with innumerable tan to orange macules from the mid forearms to (and including) the hands. Many old scars are seen in these same areas.
Closer examination reveals that the skin in these areas is quite thin and dry. Fine telangiectasias and focal scaling are also noted. The effect is much less pronounced from about the elbow up and is totally absent on both volar forearms.
What is the diagnosis?