Sean Klepper M.D.
Artur Zembowicz M.D....
- 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
- The features are similar to those of both eczematous dermatitis and psoriasis:
- Hyper- and parakeratosis, especially around hair follicles
- 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.