Week 2

Question 1

What types of lighting helps distinguish a macule from a papule?

Answer 1

oblique lighting shows elevation in a papule

Question 2

How do you use diascopy to differentiate a purpura from a vascular extravasation?

Answer 2

press a glass slide to a red lesion to detect extravasation of red blood cells:

• if redness remains under pressure = purpura
• if redness disappears = vascular dilation

Question 3

Confluence of papules leads to the dev of larger, usually flat-topped, circumscribed, plateau-like elevations known as ____

Answer 3

plaque

Question 4

Plaque or lichenification results from repeated rubbing of the skin and most frequently develops in people with _____

Answer 4

atopic individuals

Question 5

nodules result from which 4 things in dermis or subcutaneous tissue?

Answer 5

infiltrates, neoplasms, metabolic deposits, result of malignant proliferation (SSC, BCS)
Can be in:
epidermis, dermis, or subcutaneous tissue

Question 6

Vessicles and bullae arise from a ___ at various levels of teh skin, which may be within the epidermis or at the _____ _____.

Answer 6

cleavage

epidermal-dermal interface

Question 7

_______ develop when serum, blood, or purulent exudate dries on the skin surface.

Answer 7

crusts

Question 8

Which layers of skin are involved in an erosion vs an ulcer vs a fissure? Which of these lesions typically heals without a scar?

Answer 8

erosion: epidermis
ulcer: loss of epidermis and upper papillary layer of dermis. Can extend into subcutis
fissure: epidermis, can be in dermis
* erosion heals without a scar

Question 9

which type of lesion is not palpable and is an area of change in normal skin color.

Answer 9

macule

Question 10

palpable, superficial, solid, lesion.

Answer 10

papule

Question 11

rounded or flat-topped pale red plaque or papule that disappears within 12-48 hours and can change shape

Answer 11

wheal (urticaria)

Question 12

palpable, solid, round, or ellipsoidal lesion at different depths.

Answer 12

nodule

- deeper than a papule

Question 13

What is the difference between a vesicle and a bulla?

Answer 13

vesicle - .5cm *bulla bigger ((big bully)

Question 14

What is a precursor to SCC?

Answer 14

actinic keratosis and can be reversed if you get pt out of the sun

Question 15

loss of epidermis and upper papillary layer of dermis within pathologically altered tissue?

Answer 15

ulcer