29 skin pathology i color - wordpress.com · 29/06/2012 · 29 skin pathology i color author:...
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![Page 1: 29 Skin Pathology I color - WordPress.com · 29/06/2012 · 29 Skin Pathology I color Author: Kristine Krafts Created Date: 11/25/2014 3:48:10 AM](https://reader034.vdocument.in/reader034/viewer/2022052518/5f0dfa537e708231d43d0470/html5/thumbnails/1.jpg)
Kris%ne Kra*s, M.D.
Skin I Diseases
Non-‐neoplas%c
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Non-‐Neoplas%c Skin Outline
• Introduc%on • Infec%ous disorders • Inflammatory disorders • Bullous disorders
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Non-‐Neoplas%c Skin Outline
• Introduc%on
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Normal skin
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Erythema: redness
Macule: flat lesion
Patch: a large macule (<1cm)
Papule: a raised lesion
Plaque: a large papule (>1cm)
Vesicle: a blister
Bulla: a big blister
Pustule: a blister that contains pus
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Non-‐Neoplas%c Skin Outline
• Introduc%on • Infec%ous disorders
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Impe%go
• S. aureus or S. pyogenes
• Children
• Crusty pustules on face
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Impe%go
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Impe%go
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Erysipelas
• S. aureus or S. pyogenes
• Face/scalp
• Sharply-‐circumscribed, erythematous plaque
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Erysipelas
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Necro%zing Fascii%s
• Many poten%al organisms
• Redness, pain evolving into gangrene
• Need early surgical interven%on and IV an%bio%cs
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Necro%zing fascii%s
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Acne
• Proprionibacterium acnes
• Sebaceous glands get plugged, then bacteria cause inflamma%on of the hair follicle/sebaceous gland
• Comedones (blackheads) and/or pustules
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Acne vulgaris
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Acne vulgaris
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Acne rosaceae
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Acne rosaceae
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Ringworm (Tinea)
• Named by anatomic site (e.g., %nea pedis = ringworm of foot (athlete’s foot), %nea corporis = ringworm on body)
• Red, inflamed, some%mes-‐scaly round lesions
• More common in children
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Tinea corporis
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Sporotrichosis
• Sporotrichum schenkii
• “Rose gardener’s disease”
• Painless papule, then open sore
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Sporotrichosis
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Verruca Vulgaris
• Common wart
• HPV
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Verruca vulgaris
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Herpes Simplex
• HSV I (usually causes cold sores)
• HSV II (usually causes genital herpes)
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Herpes simplex
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Herpes simplex
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Molluscum Contagiosum
• Pox virus
• Centrally-‐umbilicated red papules
• Very contagious
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Molluscum
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Erythema Mul%forme
• Usually HSV; some%mes drug-‐related
• “Target” lesions and/or vesicles on skin, mucous membranes
• Stevens-‐Johnson syndrome is a rare, very severe disease with skin necrosis.
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Erythema mul%forme
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Scabies
• Sarcoptes scabei
• Worldwide epidemic
• Hands/wrists, abdomen/groin
• Itchy rash
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Scabies
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Non-‐Neoplas%c Skin Outline
• Introduc%on • Infec%ous disorders • Inflammatory disorders
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Psoriasis
• Common, chronic, inherited disease
• Itchy red lesions with silvery scales
• Pa%ents may also have arthri%s of hands
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Psoriasis
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Lichen Planus
• Common, chronic, immune-‐mediated disease
• Skin: purple polygonal papules
• Mucous membranes: lacy-‐appearing lesions (Wickham’s striae), erosions, or leukoplakia
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Lichen planus
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Wickham’s striae
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Atopic Eczema
• Usually inherited
• Itchy rash
• O*en history of atopic disease (asthma, hayfever)
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Atopic eczema
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Non-‐Neoplas%c Skin Outline
• Introduc%on • Infec%ous disorders • Inflammatory disorders • Bullous disorders
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Pemphigus Vulgaris
• An%bodies against spot desmosomes (connect epithelial cells to each other)
• Adults (40s-‐50s)
• Mouth first, then skin
• Superficial bullae that rupture easily
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Pemphigus vulgaris
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Pemphigus vulgaris
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Pemphigus vulgaris
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Bullous Pemphigoid
• An%bodies against hemidesmosomes (connect epidermis to basement membrane)
• Elderly
• Groin, axilla, arms
• Big, subepidermal bullae
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Bullous pemphigoid
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Bullous pemphigoid
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Bullous pemphigoid