Final Flashcards
Functions of integumentary system
Barrier (UV, fluid loss)
Lymphocytes
APC
Macule
Flat discoloration
Papule
Elevated dome
Plaque
Flat-topped elevation
Scale
Dry, horny, plate-like growth
Vehicle
Fluid filled area <5mm
Bulla
Fluid filled area >5 mm
Wheal
Raised area of edema
Aka hive
Acantholysis
Loss of keratinocytes adhesion
Acanthosis
Epidermal hyperplasia
Hyperkeratosis
Hyperplasia of stratum corneum
Spongiosis
Intracellular epidermal edema
4 subcategories of acute inflammatory Dermatoses
Urticaria
Acute eczematous dermatitis
Erythema multiform
Acne
Urticaria aka
Hives/wheals
Urticaria is MC due to an
Allergic reaction
IgE dependent urticaria
Common allergens
IgE independent urticaria
ADR
Opiates, antibiotics
Urticaria MC ages
20-40 yo
Itchy and develop and fade in a few hours
Urticaria
Excessive complement activation resulting in edema in lower dermis
Hereditary angioedema
Hereditary angioedema due to inherited
C1 esterase inhibitor deficiency
Chronic eczema appearance
Scaling plaque
Acute eczema appearance
Red
Vesicles
Oozing
Crust
Allergic contact dermatitis due to what hypersensitivity
Type 4 hypersensitivity “delayed reaction”
MC form of eczema
Allergic contact dermatitis
Allergic contact dermatitis limited to contact site and involves ____ sensitization
CD4 T cells
Atopic dermatitis
Familial
Childhood onset
Improves with age
Atopic triad
Dermatitis
Asthma
Rhinitis
“Targetoid “ skin lesions that mimic ring worm
Acute skin condition
Erythema multiforme
Erythema multiform is a type ___ hypersensitivity MC due to ___ and attacks ___
4
Infection (viral)
Dermoepidermal junction
Erythema multiforme minor
Post infection
Mild
Erythema multiforme major
Drug related
Aggressive (sloughing of epidermis and fluid loss)
Stevens Johnson Syndrome
Erythema multiforme major
30% or less
Toxic epidermal necrolysis
Erythema multiforme major
30% or more of body
Lethal
Acne that is deeper, more rare, and scaring is likely
Cystic acne
Comedones or pustules are characteristic of
Acne vulgaris
Acne vulgaris caused by ___ and MC in who
Cutibacterium acnes
MC adolescent males
MC adult females
MC around 2 months, 20% of babies
Baby acne
Aka milk spots
Milium is ___, characteristic of baby acne
Keratin filled cysts
Baby acne is idiopathic, but can be due to
Maternal hormones
Excessive sebum production
3 conditions a part of chronic inflammatory dermatoses
Psoriasis
Lichen planus
Lichen simplex chronicus
Type 4 hypersensitivity in epidermis that effects 2% of population
Psoriasis
Pink to salmon colored plaque with flaky silver white scale
Psoriasis
MC locations of psoriatic lesions
Elbows Knees Scalp LS region Glans penis Intergluteal cleft
Treatment for psoriasis
Phototherapy (UVB)
Onycholysis observed in 1/3 of patients with
Psoriasis
Detachment of nail
Koebner phenomenon and Auspitz’s sign are what? And observed with what?
Koebner= plaque formation
Auspitz = microbleeds
Psoriasis
Psoriatic arthritis occurs in ___
5-30%
Pencil in cup deformity
35% of psoriatic patients have ___
Dactylitis (sausage digits)
Autoimmune skin condition with CD8 T cells in dermoepidermal junction
Lichen planus
Risks for lichen planus
ADR
Dyes
HCV infection
MC symmetrical on extremities and MC middle aged adults
Lichen planus
6 Ps of lichen planus
Pruritic Purple Polygonal Planar Papule Plaque
70% of ___ have oral involvement and have Wickham’s striae
Lichen planus
Epidermal hyperplasia and dermal scarring with raised and itchy scale are characteristic of
Lichen simplex chronicus
Repetitive trauma can cause ___
Lichen simplex chronicus
Acanthosis nigricans
Asymptomatic hyperpigmentation of skin
Dark and velvety appearance
Risks for acanthosis nigricans
Diabetes
Obesity
Genetics
Locations for acanthosis nigricans
Body folds
Axilla
Groin
Neck
80% of impetigo due to
Staph aureus
Red rash with honey colored crust
Highly contagious
Impetigo
Impetigo MC in
Children
Adolescents athletes
Dermal abscess
Deeper
Due to staph aureus or pseudomonas aeruginosa
Fungal infections are characterized with
Intense itching
Tinea corporis
Non hairy location
Tinea capitis
Scalp
Tinea unguium
Nail bed
Tinea pedis
Athlete’s foot
Tinea Barbae
Beard follicles
Tinea cruris
Groin
Jock itch
Aspergillosis is associated with ___ or ____
Comorbiidites
Immunodeficiency
Aspergillosis is angioinvasive and begins ___ and spreads ____
Lungs
Quickly
Low risk HPV infections
6 and 11
High risk HPV infections
16 and 18
Warts MC in ___ and are self limited
Pediatric
90% of genital warts, aka ___, are from ____
Condylomata acuminatum
HPV 6 or 11
3 blistering disorders
Pemphigus
Bullous pemphigoid
Dermatitis herpetiformis
Blistering disorders aka
Bullous disorders
2 types of pemphigus
Pemphigus vulgaris
Pemphigus foliaceus
Autoimmune attack in epidermis that decreases desmosomal attachments
Pemphigus
Type 2 hypersensitivity with “fishnet like pattern of IgG and loss of intracellular attachments
Pemphigus
MC population for pemphigus
Any age, older adults
Rare
MC pemphigus with blisters suprabasil
Pemphigus vulgaris
Locations for pemphigus vulgaris
Skin and mucosa Face Scalp Axilla Groin
Flaccid Bullae at any mucocutaneous area characteristic of
Pemphigus
Subcorneal bullae limited to skin and less aggressive
Pemphigus foliaceus
Bullous pemphigoid
Autoimmune attack with subepidermal blisters
Older adults
Bullous pemphigoid MC locations
Skin and mucosa Abdomen Thigh Forearm Axilla Groin
Bullous pemphigoid begins as rash and has what Ab pattern
Linear pattern of IgG
Gestational pemphigoid
Bullous pemphigoid
Tense bullae characteristic of
Bullous pemphigoid
10% of Celiac patients have
Dermatitis herpetiformis
Dermatitis herpetiformis MC affects
Males, age 20-40
Dermatitis herpetiformis MC locations
Torso
Gluteal region
Elbows
Knees
IgA on dermal papillae
Dermatitis herpetiformis
Benign skin tumor with dark, coin like lesion with a waxy appearance
Seborrheic keratosis
FGFR3 mutation causing overgrowth of keratinocytes
Seborrheic keratosis
Seborrheic keratosis MC affects
Middle aged and elderly
Leser-trelat Sign MC in GI, liver, lung, breast observed in
Seborrheic keratosis
Cradle cap aka
Seborrheic dermatitis
Scaly, flaky, itchy patches of red skin (dandruff)
Rich in sebaceous glands
Seborrheic dermatitis
5% of population with onset around puberty and peaks around age 40
Seborrheic dermatitis
Benign tumor of sebaceous gland that is slow growing and common and head and neck
Sebaceous adenoma
Sebaceous adenoma MC around age
40-60
Actinic keratosis
Dysplastic skin lesion due to chronic sun exposure
Characteristic of actinic keratosis
Small tan/brown lesions with “sandpaper-like” texture
Risk for actinic keratosis
Light skin
Some consider actinic keratosis ___
Squamous cell carcinomas in situ
Freq of actinic keratosis
10-25% population
MC older adults
Conical projections of keratin that can be benign or malignant (20%)
Cutaneous horns
Aka Cornu cutaneum
Risks for cutaneous horns
Actinic keratosis
Scars
Warts
Senile purpura aka
Solar purpura
Actinic purpura
Senile purpura result of ____
Cumulative UV damage
Damage to collagen that results in blood leaking into dermis, causing purple macules indicates what
Senile purpura
Freq of senile purpura
25% of >90 yo
Senile purpura MC location
Forearms
Hands
Liver spots aka
Solar lentigo
Solar lentigo
Hyperplasia of melanocytes due to prolonged UV exposure
Solar lentigo usually onset’s after age
40
Dermatoheliosis aka
Photoaging
Dermatoheliosis due to
Cumulative UVA and UVB exposure
UVA and UVB damage ____ and cause wrinkles and increase ____
Collagen
increase MMP activity
Pyramidine dimers can form with sunlight exposure and are ___
Carcinogenic
MC skin cancer
Basal cell carcinoma
Most dangerous skin cancer
Melanoma