Derm

Question 1

Lichen planus

Answer 1

Pruitic
Purple
. Planar
Polygonal
Papule’S
Plaques

Question 2

Answer 2

Discoid lupus erythematous
Can be associated W SLE

Question 3

Gas gangrene affects which layer? Cause?

Answer 3

Muscle
Clostroides perfringens

Question 4

Necrotizing fasciitis affects which layer? Cause?

Answer 4

Sub-q
S. Pyogenes most common
Can also be poly-microbial

Question 5

Cellulitis affects which layer? Cause?

Answer 5

Dermis
Commonly mrsa, can be other bacteria

Question 6

Impetigo affects which layer? Cause?

Answer 6

Epidermis

Most prevalent in warm, humid environments
Common in kids, spread in schools

Bullous:
- S aureus only
- less common
- in adults hiv-ass.

Non-bullous
- S aureus or s pyogenes

Question 7

Impetigo sx

Answer 7

Small red vesicles or pustules
Honey-crusted
Possible bulla

Question 8

Impetigo complication

Answer 8

If s pyogenes:
_ post infectious glomerulonephritis
- scarlet fever

If staph:
- septic arthritis
-Scalded skin syndrome

Either:
- cellulitis

Question 9

Impetigo tx

Answer 9

Usually topical abx
- Mupirocin
-retapamulin
- clindamycin
- doxy if >8 yo
- t mp-smx
Sometimes + systemic
MRSA appropriate agents i I needed

Question 10

Hot tub skin lesion

Answer 10

Hot tub_folliculitis dt pseudomonas in hair follicle

Question 11

Follicalitis risk

Answer 11

• hot tub
• HIV
  -Ic
• topical abx
  -Frequent shaving

Question 12

Follicalitis organisms

Answer 12

Mostly s.aureus
Pseudomonas (hot tub)
Keibsella
Proteus
Enterobacter
Other bacteria, fungus, virus,parasite

Question 13

Folliculitis Tx

Answer 13

Staph: mupirocin and /or clindamycin
Pseudomonas: tmp-smx or cipro
Other based on cause
All topical

Question 14

-

Answer 14

Erysipelas - outer dermis and superficial lymphatics
Can be anywhere but this is most common site
Usually s.pyogenes, sometimes si aureus

Question 15

Erysipelas * Tx

Answer 15

Usually penicillin or cef

Question 16

Lymphagitis

Answer 16

Lymph infection generally caused by another skin infection, wound
Many organisms

Question 17

Lymphangitistx

Answer 17

Oral antibiotics

Question 18

Toxin gas gangrene

Answer 18

Clostridia alpha toxin

Question 19

Tx gas gangrene

Answer 19

Anti-clostrootial ab x and surgery
+ c lindamycin -inhibits protein synthesis and tf α toxin

Question 20

Answer 20

Parvovirus
Other sx:
- ha
- fever
- sore throat
Will laterdevelop to reticulate rash on trunk and extremities

Question 21

Answer 21

Late parvovivas
Dt immune reaction
Usually feel well by this point

Question 22

Parvovirus pregnancy

Answer 22

Hydrops fetalis
Possible sa

Question 23

Parvovirus tx

Answer 23

Supportive
No vaccine

Question 24

Parvovirus transmission

Answer 24

Respiratory
Generally during asymptomaticperiod

Question 25

Hand-foot-mouth disease cause

Answer 25

Usually coxackieviruses
Also enterovirns

Question 26

Coxsackievirus micro

Answer 26

POS sense ss RNA

Question 27

Coxsackievirus transmission

Answer 27

Nasopharyngeal, contact, fecal-oral

Question 28

Complications HFMD

Answer 28

Enterovirus: possible neuro or cardiac
Generally rare

Question 29

HFMD Tx

Answer 29

Supportive
No vaccine

Question 30

Answer 30

Molluscum contagiosum
Very contagious
Poxviridal
Can occur anywhere
Often sextransmitted in ya

Question 31

Answer 31

Molluscum contagiosum

Question 32

Molluscum contagiosum Tx

Answer 32

Supportive
Antihistamines
Avoid scratching
Cryotherapy or excision
Usually self-resolve 1-2 mo

Question 33

Roseola cause

Answer 33

Hhv-6 and 7
dsDNA herpesviruses

Question 34

Roseolla sx

Answer 34

Prodromal high fever often >104
Possible febrile seizures
Kids <3, ic adults
Blanching macropapular rash spreading from neck and trunk to face and extremities

Question 35

Answer 35

Roseola

Question 36

Roseola Tx

Answer 36

Supportive
Active cooling
Antihistamines