Derm Pathology 2n1s

hallmark of ezcema

pruirits

edema, vesicles, wet, seeping, you think?

acute dermatitis

stigmata of atopy

1. xerosis

2. keratosis pilaris

3. hyperlinearity

4. allergic shiners

5. transverse nasal crease

6. dennie-morgan lines

7. adenoid facies

8. perioral pallor

what type of hypersensitivity is atopic dermatitis?

type 1

“itch that rashes”

atopic dermatitis

atopic dermatitis criteria

pruiritis*

2/3:

chronic w/ relapse + remissions

typical appearance and distrubtion

atopic FH

atopic dermatitis seen in extensor surfaces?

infantile

atopic dermatitis seen on flexor surfaces

childhood

adolescent

provoking factor of atopic dermatitis

1. winter

2. excessive washing

3. airborne irritants

4. heat/sweat

5. wool/synthetic fibers

6. stress

7. food

8. URI

immune for irritant vs. allergic contact dermatitis

I: nonimmune

A: immune

male pt tells you they have coin-like lesions symmetrically on their LEs that gets worse in the winter. you suspect?

nummular dermatitis

paint splatter appearance

guttate psoriasis

you spot a herald patch. you suspect?

pityriasis rosea

psoriasis RF

1. smoking

2. alc abuse

3. obesity

auspitz sign and nail pits, you suspect?

psoriasis

6 P’s of lichen planus

• Purple /pink (violaceous)

• Pruritic (making it different from psoriasis)  → Koebnerization: lesion is spread by scratching 

• Planar

• Polygonal

• Papules convalescing into Plaques

koebner reaction makes you think?

lichen planus

wickham striae, you think?

lichen planus

what derm condition erupts in a christmas tree pattern?

pityriasis rosea

nikolsky’s sign, you suspect?

pemphigus vulgaris

pemiphigus vulgaris vs. bullous pemphigoid

PV: antibody against desmoglein

BP: antibody against hemidesmosomes

what drug commonly causes pemphigus vulgaris and bullous pemphigoid?

ACEI/ARB

pt comes to you with target-like lesions on their palms and feet. you suspect?

erythema multiforme

pt has pyoderma gangrenosum. what other medical condition do you think they have/assoc with?

IBD

6 I’s of causes of urticaria

1. infx

2. insects

3. ingestion

4. inhalation

5. injection

6. i have no idea

ACEI inhibitors are the most common cause of?

angioedema

what is a big cause of photoallergic drug eruptions?

HCTZ

what are top 2 meds that cause phototoxic dermatitis?

doxy

HCTZ

what are the 4 factors contributing to acne?

1. follicular hyperkeratinization

2. increased sebum production

3. infection

4. inflammation

what is the only drug that attacks all 4 components of acne?

oral retinoids

cause of hot tub folliculitis

pseudomonas aeruginosa

pt has a white raised bump with a dark dot in the middle. you suspect?

pilar cysts

(dot in the middle = hair)

non-bullous impetigo cause

GABHS* + staph aureus

pt has honey-colored crusting and satellite lesions. you suspect?

impetigo

pt has intense erythema on their face. they said before this happened, they had a lot of itchy, burning, and pain. you inspect and it has a elevated leading edge. it is warm and tender. you suspect?

erysipelas

pt has a bright red patch. you see lymphatic streaking, clearer margins. the culture reveals group a strep. you think?

erysipelas

acute inflammatory infx of the epidermis

erysipelas

infx of dermis and subcutis

cellulitis

cellulitis RF

• DM

• Liver disease

• Immuno compromise

• Poor lymphatic drainage or circulation

furuncles and carbuncles RF

• Moist areas

• Obesity

• Poor hygiene

• DM 

• Any compromise to the ski

F and obese pt comes to you saying they have open wounds that do not heal. they now have formation of sinus tracts and double ended pseudo-comedones in the armpits. you suspect?

hidradenitis suppurativa

hypertrophic scar

keloid

cyst

burrows

koebner’s phenomenon

PSORIASIS ONLY

koebnerization

(anything NON psoriasis)

acute dermatitis

subacute dermatitis

chronic dermatitis

atopy

atopic dermatitis

atopic dermatitis childhood pattern

atopic dermatitis adult pattern

contact dermatitis

diaper dermatitis

nummular dermatitis

perioral dermatitis

seborrheic dermatitis

stasis dermatitis

dyshidrotic eczema

prurigo nodularis

plaque psoriasis

guttate psoriasis

inverse psoriasis

auspitz sign

lichen planus

pityriasis rosea

erythema nodosum

pemphigus vulgaris

bullous pemphigoid

erythema multiforme

SJS / TEN

urticaria

acne vulgaris

acne rosacea

vascular rosacea

phymatous rosacea

ocular rosacea

folliculitis

hot tub folliculitis

sycosis barbae

pseudofolliculitis barbae (razor bumps)

impetigo

erysipelas

cellulitis

furuncles (boils) and carbuncles

cause of furuncles and carbuncles

staph aureus

if you see lots of skin tags (acrochordons), you’re suspecting?

possible diabetic

hidradenitis suppurativa

pitted keratolysis

tinea corporis

tinea pedis (athletes foot)

= ?

tinea corporis

tinea capitus (tonsurans)

tinea versicolor

tinea versicolor cause

malessezia furur

you see this, you suspect?

tinea versicolor

cause of tinea cruris (jock itch)

t rubrum

mentagrophytes

tinea cruris (jock itch) RF

• Humid climates

• Occlusive clothing

• Obesity

• Topical corticosteroids

• Male gender