Morphology

Question 1

(primary/secondary) lesion is the initial lesion that occurs

Answer 1

Primary

Question 2

flat, not palpable, < 1cm

Answer 2

Macule

Question 3

Examples of external forces that can cause secondary lesions (erosions, ulcers, etc.)

Answer 3

Scratching
Trauma
Infection
Healing process

Question 4

flat, not palpable, > 1cm, may have macules that coalesce into patches

Answer 4

Patch

Question 5

raised, palpable, <1cm, elevated due to thickening of the epidermis or cell deposits in the dermis

Answer 5

Papule

Question 6

raised, palpable, >1cm, elevated due to thickening of the epidermis or cell deposits in the dermis, may have papules that coalesce into a plque

Answer 6

Plaque

Question 7

A LARGER, deeper papule, elevated but deeper condition, dermis or subcutaneous fat, greatest mass beneath the surface, may be compressible, rubbery, or firm

Answer 7

Nodule

Question 8

blister with clear fluid, <1cm

Answer 8

Vesicle

Question 9

blister >1cm

Answer 9

Bulla

Question 10

vesicle with purulent material, elevated, <1cm, maybe infectious or sterile

Answer 10

Pustule

Question 11

(primary/secondary) lesions are the changes that occur over time or manipulation (scratching, trauma, infection, etc.)

Answer 11

Secondary

Question 12

serous, dried serum, hemorrhagic

Answer 12

crust

Question 13

accumulation of stratum corneum due to increased proliferation of keratinocytes or decreased desquamation of keratinocytes; variable types and patterns

Answer 13

scale

Question 14

linear break in the epidermis, painful

Answer 14

fissures

Question 15

loss of epidermis, moist oozing, bleeding

Answer 15

erosion

Question 16

deeper involvement than erosion, at least all of epidermis lost and parts of dermis too

Answer 16

ulcer

Question 17

scratched marks

Answer 17

Excoriation

Question 18

thinning of the epidermis leading to wrinkling and a shiny appearance

Answer 18

epidermal atrophy

Question 19

loss of dermal collagen leading to depression in the skin

Answer 19

dermal atrophy

Question 20

thickening of the epidermis with accentuation of the skin lines

Answer 20

lichenification

Question 21

a procedure usually for biopsy of lesions where goal is removal of a portion of the epidermis and superficial dermis

Answer 21

shave biopsy

Question 22

Technique of choice for rash evaluation or when you need to see what’s happening in the dermis, 4mm deep and across

Answer 22

punch biopsy

Question 23

evaluation of dermis and subcutaneous fat

Answer 23

incisional biopsy

Question 24

liquid nitrogen application at 196 degrees Celcius. Used to treat AK, SK, skin tags, warts, it may lead to hypopigmentation since melanocytes are more sensitive than keratinoyctes

Answer 24

cryotherapy

Question 25

a tool that uses polarized light to look for vessel patterns and other features

Answer 25

dermoscopy

Question 26

Scraping superficially with blade to remove stratum corenum and evaluate for fungal organisms on light microscopy. Used for tinea corporis, pedis, tinea versicolor

Answer 26

KOH Prep

Question 27

Scraping s. corneum to look for scabies mites or ova on light microscopy. Mineral oil or KOH is used

Answer 27

Scabies prep