Seborrhoeic Dermatitis in Adults Flashcards
1
Q
What is the cause of seborrhoeic dermatitis in adults?
A
An inflammatory reaction related to a proliferation of a normal skin inhabitant, a fungus called Malassezia furfur (formerly known as Pityrosporum ovale).
2
Q
What percentage of the population get it?
A
2%
3
Q
What are some features of seborrhoeic dermatitis in adults?
A
- Eczematous lesions on the sebum-rich areas: scalp (may cause dandruff), periorbital, auricular and nasolabial folds
- Otitis externa and blepharitis may develop
4
Q
What are some conditions that are associated with seborrhoeic dermatitis?
A
- HIV
- Parkinson’s disease
5
Q
How is scalp disease managed in seborrhoeic dermatitis?
A
-
First line - OTC preparations containing:
- Zinc pyrithione (‘Head & Shoulders’)
- Tar (‘Neutrogena T/Gel’)
- Second-line agent is ketoconazole
- Selenium sulphide and Topical Corticosteroid may also be useful
6
Q
How do you manage seborrhoeic dermatitis on the face and body?
A
- Topical antifungals: e.g. Ketoconazole
- Topical steroids: best used for short periods
7
Q
Why can seborrhoeic dermatitis be difficult to treat?
A
Recurrence is common
8
Q
A
9
Q
A
10
Q
Classic Presentation: Pink coloured patches with a yellow/brown scale.The main affected areas are the sternum, eyebrows and the nasal bridge.
A
