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Flashcards in DERMATOLOGY Deck (37)
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1

2 most common causative organisms in Cellulitis

Staph aureus and group A strep

2

Treatment of cellulitis

Oral ceph or pen-resistant beta lactase for 10-14 days
linezolid or IV vance for MRSA or cases not responding to initial antibiotic therapy.

3

Causative agent in most necrotizing fasciitis

Group A strep

4

Causative agents in Impetigo

S auresu or group A strep

5

2 common causes of acne outbreaks in adulthood

Corticosteroid use
Androgen production disorders

6

First line tx for acne vulgaris

Topical retinoids, whicch decrease sebaceous gland activity and normalize follicular keratinization

7

Immunocompromised patients are at an increased risk for developing which 2 complications from varicella infection?

Encephalopathy
Retinitis

8

Tx of scabies

Permethrin or oral ivermectin

9

Pruritis, erythematous scaly plaques with central clearing

Tinea infections. Microsporum, trichophyton, or epidermophyton.

10

Most allergic contact derm is what hypersensitivity?

Type IV

11

Labs in erythema multiforme

Increased eosinophils
Skin bx shows increased lymphocytes and necrotic keratinocytes

12

Infectious causes of erythema multiforme

HSV and Mycoplasma pneumoniae

13

Difference between SJS and TEN?

SJS: no more than 10% of skin sloughing
TEN: >30%

IDk about in between ?!

14

Tx for pityriasis rosea

Self limited! Topical steroids, phototherapy or erythromycin may decrease duration

15

Describe erythema nodosum

Inflammation of SUBQ FAT SEPTA resulting in painful erythematous nodules -- > most commonly on anterior tibias

16

Pemphigus vulgaris H/P

PAIN, FRAGILE BLISTERS in OROPHARYNX and on chest, face, and perineal region
Positive nikolsky's sign

17

Labs in pemphigus vulgaris

Skin bx shows separating of epidermal cells (PACANTHOLYSIS) with intact BM

18

Tx of pemphigus vulgaris

Corticosteroids ,azathioprine or cyclophosphamide

19

Pathophys of bulls pemphigoid

Autoimmune disorder characterized by autoantibdodies to epidermal BM

20

Tx of bullous pemphigoid

Oral or topical corticosteroids or azathioprine

21

Pathophys of porphyria cuteneouRisks tarda

Deficiency of hepatic uroporphyrinogen decarboxylase, an enzyme involved in heme metabolism

22

Risk factors for pemphigus vulgaris

Alcoholism, hep C, iron overload, estrogen use, smoking

23

H&P of porphyria cutanea tarda

Chronic blistering lesions on unexposed skin, hyper pigmented skin, facial hypertrichosis, ruptured blisters heal poory and result in scarring

24

Labs in porphyria cutanea tarda

Elevated AST and ALT, increased total plasma porphyrin, increased urine porphyrins, decreased uroporphyrinogen decarboxylase

25

Tx of porphyria cuteness tarda

Periodic phlebotomy
Low-dose chloroquine or hydroxychloroquine
Sunscreen
Avoid triggers

26

Tx of actinic keratosis

Even when its suggested, biopsy a lesion to rule out SCC. Tx with topical 5-FU or imiquimod, cryotherapy.

27

Arsenic exposure increases risk for what cancer?

SCC

28

Tx of SCC

Mohs excision for lesions on face. Radiation may be helpful in large lesions.

29

Biopsy shows basophilic-staining basal epidermal cells arranged in palisades

Basal cell

30

Most common melanoma

Superficial spreading