alopecia abdulmajeed alajlan, md assistant professor dermatology dept. hair transplant surgery head...
Post on 21-Dec-2015
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TRANSCRIPT
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Alopecia
Alajlan/Alopecia
Scaring(Irreversible
)
None Scaring
(Reversible). X
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Introduction & definition
Alopecia = HAIR LOSS Basic hair anatomy and PhysiologyHair growth is very dynamic Vellus and Terminal hair
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Alopecia = HAIR LOSS Basic hair anatomy and PhysiologyHair growth is very dynamic Vellus and Terminal hair
Introduction & definition
How many hairs in the body?
5 millions hairs; 100,000 in the scalpGrowth rate?
0.3mm/day for scalp hair
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Androgenetic Alopecia(Male and Female Pattern Hair Loss)
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Male Pattern Hair Loss
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Female Pattern Hair Loss
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Androgenetic Alopecia affects up to 50% of males and 40% of females
Autosomal dominant with variable penetrance
85% : +ve family history Role of androgens in the pathogenesis:
Androgenetic Alopecia
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5 ALPHA Reductase
Testosterone
DihydorTestosterone (Active)
X Fenastride
Systemic Treatment
Miniaturization of Terminal Hairs
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Topical Treatment
Minoxidil 2% and 5% Solution
(uncertain mechanism)
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Alopecia Areata
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Alopecia Areata affects up to 2%30%: +ve Family history75% : Self recovery Role of immune system in the pathogenesis Types of alopecia areata: - localized partial - localized extensive - alopecia totalis - alopecia universalis
Alopecia Areata
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Treatment1. …
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Treatment 2. Intralesional Corticosteroids
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Skin Sensitizers
(Immune modulating Rx)
- Diphencyclopropenone (DPCP)
- Anthraline
- others
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Other RxTopical steroids
Systemic Steroids
Cytotoxic Rx
Phototherapy
Minoxidil
Hair TransplantX
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Anagen effluvium Telogen
effluvium
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Anagen effluvium
Always related cytotoxic chemotherapy Acute and severe alopecia Mostly reversible but not always
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Telogen effluviumChronic alopecia Anemia with chronic disease Common and None specific Additional cause: drugs Weight loss Acute blood loss General anasthesia Low iron Others Reversible (but may be become chronic) Could it be preventable?
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Vitiligo
Alajlan/Vitiligo
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Alajlan/Vitiligo
Vitiligo
Introduction to skin pigments
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Alajlan/Vitiligo
Vitiligo
Introduction to skin pigmentsDefinitionTypes: localized and generalizedPathogenesis Other associated diseasesNatural courseTreatment
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Alajlan/Vitiligo
No single effective Rx Topicals: .Corticosteroids .Immunomodulators Light Therapy: 1. UVA or UVB 2. UVA + Psoralen = PUVA
(Topical and Systemic) 3. UVB = Laser Systemic Treatment: NOT USED Surgical Rx: .Melanocyte Transplant .Skin Grafts Transplant Bleaching Agents: Depigment all skin
Treatment
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Alajlan/Vitiligo
• Tips of fingers and toes
• Lips
• Bony prominence
• Recurrence
• Rarely 100% repigmentation for large area
• Adverse effect of Rx
Treatment Pearls