Seborrhoeic Dermatitis

  • rash with epidermal change

Who is likely to have it?

  • adult form

    • more common in men

  • infantile form

    • less than 6 months old

What Symptoms / Signs can they show?

Adult

  • lesions

    • discrete

    • erythematous

    • may have yellow crust

  • distribution

    • central part of face

    • scalp

    • ears

    • eyebrows

    • medallion and petaloid lesions over sternum and sometimes back

    • well defined areas in axillae, groin, beneath breasts

Infantile

  • florid red eruption

  • well defined lesions

  • trunk

  • confluent areas in flexures

  • scaling of scalp

  • NOT itching → atopic eczema

What causes this disease?

  • ? Pityrosporum ovale

Pathology

  • thickening of epidermis

  • some inflammatory change

  • intercellular oedema

  • parakeratosis

What tests can or should be done?

  • none

  • Infantile

    • IgE NOT raised (distinguishes from atopic eczema)

Treatments available

Adult

  • topical steroids

  • topical salicylates

  • triazoles

Infantile

  • avoid soap

  • emollients

  • hydrocortisone cream + antibiotic + nystatin

Prognosis

Infantile

Complications

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