Dermatology Flashcards

1
Q

Primary skin lesion defined

A

from a disease process and has not been manipulated by outside tx.
vesicle

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2
Q

Secondary skin lesion defined

A

lesions altered by outside manipulation or tx

crust: occurs when vesicle ruptures

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3
Q

Macule defined

A

flat

nonpalpable

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4
Q

Papule defined

A

solid elevation
< 1 cm
raised nervus

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5
Q

Vesicle defined

A

fluid filled
< 1cm
varicella
herpatic lesion

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6
Q

Pustule defined

A

vesicle-like lesion with purulent drainage
< 1 cm
impetigo

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7
Q

Patch defined

A

flat
nonpalpable
> 1cm
vitiligo

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8
Q

Plaque defined

A

raised
same or different color of skin
> 1cm
psoriasis vulgaris

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9
Q

Bulla defined

A

fluid filled
> 1 cm
2 degree burn, necrotizing facitis

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10
Q

Cyst defined

A
raised
encapsulated
fluid-filled
any size
intradermal cyst
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11
Q

Wheal defined

A

circumscribed area of skin edema
any size
hive

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12
Q

Purpura defined

A

flat
red-purple discoloration caused by RBCs lodged in skin
if < 1cm called petechiae

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13
Q

Auspits sign

A

pinpoint bleeding when scale removed

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14
Q

Excoriation defined

A
secondary lesion
linear
raised
covered in crusts
any size
scratch marks
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15
Q

Crust defined

A

secondary lesion
raised lesion produced by dried serum or blood
any size
scab

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16
Q

Lichenification defined

A

secondary lesion
skin thickening found of pruitic areas
any size
callus

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17
Q

Scales defined

A

secondary lesion
raised superficial lesions that flake with ease
any size
dandruff

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18
Q

Erosion defined

A

secondary lesion
loss of epidermis
> 1cm
open bulla or vessicle

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19
Q

Ulcer defined

A

secondary lesion
loss of epidermis and dermis
> 1 cm
chancre

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20
Q

Fissure defined

A

secondary lesion
narrow linear crack into epidermis exposing the dermis
> 1 cm
athletes foot

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21
Q

Annular distribution

A

in a ring
limes desease
erythemia migranes

22
Q

Scattered distribution

A

generalized over body without pattern
maculopapular rash
rubella (German measles)

23
Q

Confluent or coalescent distribution

A

multiple lesions blending together

24
Q

Clustered distribution

A

occurring in group without a pattern

drug induced rash (lithium, iodine, phenytoin)

25
Q

Linear distribution

A

in streaks

contact derm from poison ivy/oak

26
Q

Reticular distribution

A
net-like cluster
erythema infectiosum (5ths disease)
27
Q

Dermatomal or zosteriform distribution

A

limited to boundaries of a single or multiple dermatomes
shingles
herpes zoster

28
Q

Varicella =

A

chickenpox

29
Q

Zoster =

A

shingles

30
Q

Varicella facts

A

peas age 9-11 if not immunized
vaccine at 1 yr
2-3 mm vesicles on trunk first
can get bacterial infection due to scratching
varivax (shot) proves 80% immunity with 1 dose and 99% after 2nd dose

31
Q

Zoster facts

A
those > 50
slowly resolves with crusting
postherpetic neuralgia possible
eye involvement
zostervax
32
Q

Tx postherpetic neuralgia

A

tricyclic antidepressant

gabapentin

33
Q

Actinic keratoses description

A
most common precancerous lesion
could be early stage squamous cell 
sun exposed areas
red or brown
scaly
can be skin colored
34
Q

Tx of actinic keratoses

A
can remain unchanged
spont. resolve
progress to squamous cell
cryosurgery
topical 5 fluorouracil
diclofenac gel
aminolevulinic acid
35
Q

Basal cell carcinoma

A
more common 
sun exposed
arise de novo (pop up)
papule
pearly or waxy look
telangiectasia
low risk of metastasis
36
Q

Squamous cell carcinoma

A

less common
sun exposed
can arise from actinic keratoses or just pop up
red, hard lesion
less distinct borders
metastatic risk ( greatest on lip, mouth, genitalia)

37
Q

ABCDE to describe malignant melanoma

A
asymmetric
irregular borders
color not uniform
diameter > 6mm
evolving new lesion or change in longstanding lesion
can be elevated
38
Q

Tx for psoriasis vulgaris

A

Vit D cream

makes it moist

39
Q

Tx for Herpes zoster/varicella

A

Oral valacyclovir

40
Q

Tx for scabies

A

Permethrin loation
put on for 6-8 hrs from neck down
take antihistamine or vistaril for itch

41
Q

Tx for verruca vulgaris

A

imiquimod cream

42
Q

Tx for tinea pedis

A

topical ketoconazole

43
Q

Tx for rosacea

A

topical metronidazole

44
Q

Tx for keratosis pilaris

A

Ammonium lactate lotion

45
Q

most likely to occur over waistband

A

scabies

46
Q

usually precede by herald patch on trunk

A

pityriasis rosea

goes away on its own

47
Q

acanthosis nigricans described

A

hyperpigmented plaques on neck, axilla and groin

common with hyperinsulinemia/DM

48
Q

Tx for MRSA

A

Trimethoprim-sulfamethozazole (Bactrim)

Doxy

49
Q

sun exposure in babies < 6 months

A

avoid

where long cool clothing

50
Q

sun exposure in children > 6 month

A
cover up in best line of defense
hat
sunglasses
peak sun 10am - 4pm
sunscreen every 2 hours