Skin and Cutaneous Disorders

Question 1

What antibiotic should be added to the typical serious cellulitis treatment regimen to treat organisms associated with necrotizing fasciitis?

Answer 1

Clindamycin

Question 2

What syndrome can cause recurrent viral-like illnesses and aphthous ulcers in children?

Answer 2

Periodic fever, aphthous stomatitis, pharyngitis, and cervical adenitis syndrome

Question 3

Impetigo treatment is MRSA is suspected

Answer 3

Bactrim

Question 4

Impetigo treatment if systemic

Answer 4

Dicloxacillin, Cephalexin

Question 5

Impetigo treatment if topical

Answer 5

Mupirocin, Retapamulin

Question 6

What post-infectious sequelae are associated with impetigo?

Answer 6

Rheumatic fever and poststreptococcal glomerulonephritis (in GAS-associated impetigo)

Question 7

Intermittent, colicky abdominal pain in a patient with HSP is suggestive of what intra-abdominal process?

Answer 7

Intussusception

Question 8

Small vessel vasculitis with IgA deposits in skin or kidney;

dx?

Answer 8

HSP

Question 9

What acquired immunodeficiency syndrome-defining illness resembles molluscum contagiosum with widespread centrally umbilicated skin lesions?

Answer 9

Disseminated cryptococcus

Question 10

What should be a consideration in recurrent fungal infections?

Answer 10

Diabetes alters the urogenital flora making fungal infections more common and can be screened with historical information of polyuria or point of care testing with a finger-stick blood test for glucose.

Question 11

What is the typical appearance of squamous cell carcinoma?

Answer 11

Irregular growth with erythema, induration, inflammation, crusting, or oozing

Question 12

Antibiotic of choice for mild erysipelas

Answer 12

Penicillin

Question 13

Up to how long after discontinuation of a suspected agent can Stevens-Johnson syndrome occur?

Answer 13

4 weeks

Question 14

Flu like prodrome, urethritis, rash;

dx?

Answer 14

SJS

Question 15

What is the treatment of choice for tinea versicolor?

Answer 15

Topical antifungals (e.g., terbinafine, azole antifungals)

Question 16

Tx mycobacterium marinum

Answer 16

Clarithromycin
Minocycline or doxycycline
Bactrim

Question 17

What is a life-threatening infection of the perineum that can begin as a cellulitis?

Answer 17

Fournier’s gangrene is a rapidly progressing infection of the skin, fat, fascia, or muscle that requires immediate surgical consultation to prevent further spread.

Question 18

Cause of staph scalded skin syndrome

Answer 18

exotoxin producing Staph aureus
(+) Nikolsy bc sloughs
spares mucous membranes

Question 19

Tx for staph scalded skin syndrome

Answer 19

Nafcillin or oxacillin

Supportive care

Question 20

What sexually transmitted infection has been associated with erythema nodosum?

Answer 20

Chlamydia

Question 21

First line treatment for erythema nodosum

Answer 21

NSAIDs

Question 22

How does pemphigus vulgaris differ from bullous pemphigoid in presentation?

Answer 22

Patients with pemphigus vulgaris are often younger with painful, flaccid bullae which may involve the mucous membranes and are Nikolsky sign positive

Question 23

Tx for widespread bullous pemphigoid

Answer 23

Prednisone

Question 24

Common causes of allergic dermatitis

Answer 24

Poison ivy (uroshiol)
Nickel
Cobalt
Potassium dichromate

Question 25

Tx of choice for scabies

Answer 25

Permethrin cream

Oral ivermectin for nursing home outbreaks

Question 26

Linear burrow is pathognomonic for

Answer 26

Scabies

Question 27

Treatment for pinworms

Answer 27

Mebendazole

Question 28

Cellulitis treatment if PCN allergic

Answer 28

Clindamycin
Erythromycin
Azithromycin

Question 29

Cellulitis tx if MRSA

Answer 29

Bactrim
Doxy
Clinda

Question 30

Simple cellulitis tx

Answer 30

Cephalexin
Amoxicillin
Dicloxacillin

Question 31

What antibiotic should be added to the typical serious cellulitis treatment regimen to treat organisms associated with necrotizing fasciitis?

Answer 31

Clindamycin

Question 32

Treatment of oral candidiasis

Answer 32

Oral nystatin

Question 33

What post-infectious sequelae are associated with impetigo?

Answer 33

Rheumatic fever and poststreptoccocal glomerulonephritis

Question 34

A skin or kidney biopsy with IgA deposition confirms the diagnosis of:

Answer 34

Henoch-Schonlein purpura

Question 35

Heme positive stool, +/- intussusception
Microscopic hematuria, +/- proteinuria
Periarticular disease of knees and ankles
dx?

Answer 35

HSP

Question 36

Most common cause of jock itch (tinea cruris)

Answer 36

Trichophyton rubrum

Question 37

Treatment options for moderate/systemic erysipelas

Answer 37

Ceftriaxone

Cefazolin

Question 38

Treatment options for mild erysipelas

Answer 38

Amoxicillin

Cephalexin

Question 39

Most common organism involved in erysipelas

Answer 39

beta-hemolytic strep (strep pyogenes)

Question 40

Drugs that can cause SJS

Answer 40

Sulfa
Phenobarbitol. carbamezeine, lamotrigine
Allopurinol
NSAIDs

Question 41

Infection that can cause SJS

Answer 41

Mycoplasma pneumonia

Question 42

Flu-like prodrome;
Urethritis;
Lesions–mucosal and cutaneous;
Dx?

Answer 42

SJS

Question 43

How long after discontinuation of a suspected substance can SJS occur?

Answer 43

Four weeks

Question 44

Treatment for sporotrichosis

Answer 44

Itraconazole

Ampho B if severe, disseminated

Question 45

Well demarcated granuloma w/ swelling;
lymphadenopathy;
works at aquarium;
dx?

Answer 45

Mycobacterium marinum

Question 46

Treatment of mycobacterium marinum

Answer 46

Clarithromycin
Minocycline or doxycycline
Bactrim

Question 47

What is a life-threatening infection of the perineum that can begin as a cellulitis?

Answer 47

Fournier’s gangrene

Immediate surgical consultation required

Question 48

Nikolsky sign in Staph scalded skin syndrome

Answer 48

Positive

Question 49

Nikolsky sign in SJS (and TEN)

Answer 49

Positive