A Clinical Atlas of 101 Common Skin Diseases

Clinical Case Challenge

What is your diagnosis?
Participate in the Clinical Case Challenge to enhance your knowledge and ability to diagnose common skin conditions.

Question 1 of 1


Contributed by Megan Noe, MD

A 75-year-old male without significant past medical history presents for evaluation of a long-standing rash around the mouth. He denies the use of any new personal care products. The patient does wear dentures and reports that they are loose, but he is able to eat without difficulty and reports a varied diet of fruits, vegetables, whole grains, and meat.

  • Healthy appearing male.
  • Exam reveals crusted erythematous plaques with fissuring at the bilateral oral commissures.
  • KOH prep is negative for Candida.
What is your diagnosis?