Seborrheic dermatitis in Child
The yeast Malassezia has long been regarded as the central predisposing factor to disease development. Malassezia is a normal component of skin flora, but in individuals with seborrheic dermatitis, the yeast invades the stratum corneum, resulting in free fatty acid formation and the activation of the inflammatory cascade. Changes in the skin microbiome have also been implicated in pathogenesis. Additional factors related to the environment such as low temperatures and humidity have been identified as potential triggers.
L21.9 – Seborrheic dermatitis, unspecified
50563003 – Seborrheic dermatitis
Differential Diagnosis & Pitfalls
- Perioral dermatitis of childhood
- Tinea versicolor
- Atopic dermatitis
- Psoriasis – The distinction between psoriasis and seborrheic dermatitis may be difficult at times, and there may be an overlap condition, sometimes referred to as sebo-psoriasis, particularly when "greasy" scale is present in the scalp.
- Candidal intertrigo
- Allergic contact dermatitis
- Irritant contact dermatitis
- Nummular dermatitis (nummular eczema)
- Tinea corporis, tinea cruris
- Pityriasis rosea
- Lichen simplex chronicus
- Darier disease
- Langerhans cell histiocytosis
- Juvenile dermatomyositis – The eyelid erythema seen in this condition has a more violaceous hue. The scalp is pink, scaly, and extremely pruritic.
- Subacute cutaneous lupus erythematosus
- Acrodermatitis enteropathica
- Discoid lupus erythematosus
Drug Reaction Data