Cutaneous Gross Anatomy Flashcards Preview

Week 44: Rash > Cutaneous Gross Anatomy > Flashcards

Flashcards in Cutaneous Gross Anatomy Deck (20)
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1

9 primary lesions

Macule
Patch
Papule
Plaque
Vesicle
Bulla
Pustule
Nodule
Cyst

2

Macule

Flat, non palpable
1 cm or LESS in diameter

3

Patch

Flat, non palpable
> 1cm diameter
Arises de novo or through coalescence of macules

4

Papule

Elevated, solid, palpable
1 cm or LESS in diameter

5

Plaque

Elevated, solid, palpable
> 1cm in diameter
Arises de novo or as the result of coalescence of papules

6

Vesicle

Liquid or fluid filled (ie blisters)
1 cm or LESS in diameter
Grouped vesicles on an erythematous base = herpes

7

Bulla

Liquid or fluid filled (ie blisters)
> 1 cm in diameters

8

Pustule

Pus containing
Usually small, but can coalesce

9

Nodule

Solid, palpable with significant depth
Usually > 1cm and extend into the dermis and/or subcutis
Have to touch the skin to determine this - cannot determine depth from a picture

10

Cyst

Sac containing fluid or semisolid material (cells or cell products)
Usually in the dermis/subcutis
Fluctuant (can feel the fluid in it)

11

Wheals/hives

Transient (<24 hours) well circumscribed papules or plaques seen in urticaria
Due to dermal edema
Usually puritic

12

Telangiectasis

Dilated superficial dermal vessel

13

Comedome

Dilated pore with keratinous debris
Can be open (blackhead) or closed (whitehead)

14

Milium

Small superficial cyst containing keratin
Usually < 1-2 mm in size

15

Burrow

Small threadlike curvilinear papule that is virtually pathognomonic of scabies

16

Primary lesion definition

Lesions that appear as a direct result of the pathologic process

17

Secondary lesion definition

Lesions that appear as a result of alteration or evolution of a primary lesion

18

Erosion vs ulcer

Erosion is a superficial open wound (loss of epidermis or mucosa only). Usually heals without scarring
Ulcer is a deeper open wound with partial or complete loss of dermis or submucosa. Usually heals with scarring

19

Hypertrophic scar vs keloid

Hypertrophic scars do not overgrow the original wound boundaries
Keloids will extend well beyond wound boundaries

20

Green toenails suggests

Pseudomonas infection