Seborrheic Dermatitis

Question 1

Overview

Answer 1

• very common inflammatory reaction to Malassezia yeast that thrives on seborrheic skin
• Malssezia is normal flora
• Chronic condition that can be controlled but not cured

Question 2

Presentation

Answer 2

erythematous scaling patches on the scalp, hairline, eyebrows, eyelids, central face, nasolabial folds, external auditory canals, central chest

Question 3

In what cases can seborrheic dermatitis be worse?

Answer 3

• HIV

- Parkinson’s Disease

Question 4

Presentation on darker skin types

Answer 4

hypopigmented

Question 5

Treatment

Answer 5

• Topical ketoconazole cream BID: reduce yeast counts
• Low-potency topical steroid for facial flares: BID X 1-2 weeks for flares
• Antidandruff shampoo: scalp and chest. Ketoconazole, selenium sulfide, zinc pyrithione. Lather, leave on 10 min, rinse, repeat 3-5Xweek

Question 6

Unique scabies pattern on the skin

Answer 6

• Burrows appear as 0.5–1.5 cm grey irregular tracks in the web spaces between the fingers, on the palms and wrists.
• Thin thread-like linear “tunnel”

Question 7

Other scabies presentations on the skin

Answer 7

• Excoriations causing erosions are common and can destroy burrows
• Vesicles may also be present
• Red itchy nodules to penis, scrotum are scabies till proven otherwise