Wk 16 Dermatology

Question 1

small cutaneous blister

Answer 1

vesicle

Question 2

Primary lesion

Answer 2

macules, patches, papules, plaques, vesicles, bullas, nodules, tumors, pustules, comedo, wheal, cyst most characteristic, representative or native appearance of skin lesion

Question 3

What is the single, most determining melanoma characteristic

Answer 3

thickness

Question 4

What is the single, most melanoma prognostic factor

Answer 4

thickness

Question 5

Macules and patches

Answer 5

both flat
-macule < 1 cm
patch > 1 cm

Question 6

papules and plaques

Answer 6

both raised
papule< 1 cm
plaque > 1 cm

Question 7

Vesicle and bullas

Answer 7

Both fluid filled
vesicle <1 cm
Bulla > 1 cm

Question 7

Nodule and tumor

Answer 7

nodule - usually dermal or subq, greatest mass tends to be under surface
tumor - general refers to neoplasms. Tends to be rounded

Question 8

Pustule and comedo

Answer 8

Pustule - filled w/ purulent fluid
comedo - lesion of acne, pilosebasceous unit filled w/ keratin (open vs closed)

Question 9

Wheal

Answer 9

pink, edematous papules and plaques, often annular

Question 10

cyst

Answer 10

closed sac

Question 11

Secondary lesion/change

Answer 11

effects of exogenous factors or temporal changes that evolve during the course of a skin disease

Question 12

Scale vs crust

Answer 12

secondary
scale - Accumulation of stratum corneum due to increased proliferation and/or delayed desquamation
crust - Serum, blood or purulent material

Question 13

excoriation vs fissure

Answer 13

Secondary
excoriation = Exogenous injury to epidermis
fissure = linear cleft

Question 14

Erosion vs ulcer

Answer 14

secondary features
erosion - partial loss of epidermis
ulcer - Full thickness loss of the epidermis. May have loss of the dermis or subcutis

Question 15

Petechiae vs purpura

Answer 15

secondary features
petechiae - Non-blanchable macules small, < 2 mm
purpura - Non-blanchable macules, patches, papules, plaques

Question 16

What is diascopy

Answer 16

Empty blood from the superficial vessels to determine if redness is from blood within vessels (erythema) or extravasated into the skin (petechiae, purpura)

Question 17

Atrophy vs Lichenification

Answer 17

Secondary features
atrophy - Depression of skin from thinning of epidermis, dermis or fat
Lichenification - Thickening of the epidermis and accentuation of natural skin lines

Question 18

Distribution vs configuration

Answer 18

distribution - where on body are the lesions?
configuration - how are the lesions arranged?

Question 19

Terms for configuration

Answer 19

annular - ring shaped
nummular - coin shaped
polycyclic - coalescing circles, rings, incomplete rings
serpiginous - snakelike or serpentine
geometric

Question 20

Terms for distribution

Answer 20

Scattered, widespread
acral- distal extremities
intertriginous - skin creases & folds
dermatomal
linear
grouped
targetoid - bull’s eye
photodistributed
symmetric