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 42-year-old female presents for evaluation of a rash under her arms and in the inguinal folds, present for several years. She reports it is worse in the summer months when she is hot and sweaty. She is otherwise healthy and takes no medications.

  • Family history positive for psoriasis.
  • On exam, there are bright red plaques without scale in bilateral axillae and inguinal folds. In the scalp, there are scattered erythematous plaques with greasy scale.
  • Pitting is present in several fingernails.
What is your diagnosis?