Clinical Features:

• Greasy, scaly patches affecting the seborrheic areas of the body: scalp, face, upper chest and back and sometimes the flexural areas
• Some patients have a family history of the disorder.
• May be caused by Pityrosporum ovale
• Associated with a number of diseases, including HIV, Parkinson's disease, obesity, epilepsy, myocardial ischemia, malabsorption and alcoholism

Histologic Features:

• The features are similar to those of both eczematous dermatitis and psoriasis:
  • Psoriasiform hyperplasia
  • Hyper- and parakeratosis, especially around hair follicles
  • Spongiosis
  • Exocytosis of neutrophils
  • Upper dermal perivascular lymphocytic infiltrate
• Yeast forms are sometimes seen in the stratum corneum.
• In the early stages seborrheic dermatitis may closely resemble psoriasis.

Cases associated with this book:

Seborrheic dermatitis
Author: Artur Zembowicz M.D. Ph.D.

Conference: DermatopathologyConsultations.com Teaching Collection