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