dermatitis and eczematous disorders
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DERMATITISAND ECZEMATOUS DISORDERS
Dr. Abdulmajeed AlajlanAssociate Professor
Consultant Dermatologist & Laser surgeonDepartment of Dermatology- KSU
Dermatitis Objectives
To know the definition & classification of Dermatitis/Eczema
To recognize the primary presentation of different types of eczema
To understand the possible pathogenesis of each type of eczema
To know the scheme of managements lines
Eczema Definition: inflammation of
the skin
Ezema vs. dermatitis
Classification:
Types of classificationBenefit of classification
Eczema
Acute eczema: erosion, oozing and vesicles
Eczema
Chronic eczema: lichenification, drak pigmentation and thick papules and plaques
Eczema
Contact Dermatitis
Definition: dermatitis results from contact with external materials
Contact Dermatitis
Pathogenesis:
Irritant vs. allergic Common irritants: detergent, acids,
dust, burning chemicals, etc Common allergens: perfumes, hair
dyes, nickels, leathers, metals, rubbers, latex, cosmetics, etc
Contact Dermatitis
Clinical features
Prediliction sites: Distribution & configuration
Contact Dermatitis
Management:
Identification Patch testing: for allergic contact
dermatitis not for irritant Avoidance measures Topical corticosteroids
Contact Dermatitis
Atopic Dermatitis
Atopic Dermatits Definition: chronic relapsing itchy
skin disease in genetically predisposed patients.
Associated diseases: bronchial asthma, allergic rhinitis, allergic congectivitis
Incidence: up to 15% in developed countries
Grow out tendency!
Pathogenesis:
“Atopy”: genetic predisposition Dry skin (decrease production of moisturizing
lipids; sebum) IgE ? (Epiphenomenon) T-Cell Allergy, increased tendency to certain allergens
Atopic Dermatitis
Clinical Variants:
Infantile ADChildhood ADAdult AD
Atopic Dermatitis
Infantile AD:
DistributionPresentation Behaviour
Atopic Dermatits
Childhood AD:
Distribution PresentationBehaviour
Atopic Dermatits
Adult AD:
DistributionPresentationBehaviour
Atopic Dermatits
Erythroderma: is a very rare complication of atopic dermatitis
Complications:
Secondary infections Eczema herpeticum Growth retardation psychological
Atopic Dermatits
Cellulitis
Impitigo: Bacterial infection
Eczema Herpiticum is a serious complicaiton that needs admission and systemic antiviral
Investigations:
????????
Atopic Dermatits
Atopic Dermatits Management:
Education! Education! Education! Support! Skin care: moisturizing the skin Topical therapy: (topical steroids,
Tacrolimus, Pimecrolimus) Phototherapy Systemic therapy: steroids, Cyclosporin,
Methotrexate, Azathioprine
AD and Food! minor role
Atopic Dermatits
Seborrhoeic Dermatitis
Definition:
Seborrhoeic Dermatits
Pathogenesis:
increased Sebum!TendencyPityrosporum ovale over growth
Seborrhoeic Dermatits
Clinical features:
PresentationDistribution
Seborrhoeic Dermatits
Investigations: ????? Resistant cases think of: Histocytosis
(langerhans cell neoplasm)
Seborrhoeic Dermatits
Management:
Shampoo Antigungals Topicals Combined therapy Maintenance & recurrence
Seborrhoeic Dermatits
Dermatitis Objectives
To know the definition & classification of Dermatitis/Eczema
To recognize the primary presentation of different types of eczema
To understand the possible pathogenesis of each type of eczema
To know the scheme of managements lines
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