Skin Lesions

Question 1

Macule

Answer 1

• flat, nonpalpable
• <1cm in diameter

Question 2

Patch

Answer 2

• flat, non-palpable
• >1cm

Question 3

Papule

Answer 3

• elevated, round
• <1cm in diameter

Question 4

Plaque

Answer 4

• elevated, circumscribed
• >1cm in diameter

Question 5

Nodule

Answer 5

• elevated, circumscribed
• large volume than papule often > 2cm
• involves the dermis
• greatest mass may be beneath the skin surface

Question 6

Vesicle

Answer 6

• elevated, circumscribed
• <1cm in diameter
• primarily filled with clear fluid, may become pustular

Question 7

Bulla

Answer 7

• elevated, circumscribed
• larger vesicle, >1cm
• filled with clear fluid

Question 8

Wheal

Answer 8

• aka hive
• firm, edematous plaque
• tend to be transient

Question 9

pustule

Answer 9

• elevated, circumscribed
• usually <1cm
• filled with purulent fluid

Question 10

Flat topped

Answer 10

• lichenoid

Question 11

Answer 11

Question 12

Answer 12

Question 13

Scale

Answer 13

• hyperkeratosis
  *

Question 14

Excoriation

Answer 14

• exogenous injury to all or part of the epidermis
• secondary feature of pruritus
  
  • due to scratching

Question 15

Atrophy

Answer 15

• epidermal atrophy: thinning of the epidermis, leading to wrinkling and a shiny appearance
• dermal atrophy: loss of dermal collagen and/or elastin leading to a depression

Question 16

Lichenification

Answer 16

• thickening of the epidermis and accentuation of the natural skin lines
  i. e. acanthosis nigricans

Question 17

Fitzpatrick Scale of Skin Phototypes

Answer 17

• 1-6:
• 1: white
• 2: white
• 3: Beige
• 4: Brown
• 5: Dark Brown
• 6: Black

Question 18

What type of pruritus requires a full workup

Answer 18

• generalized unexplained pruritus

Question 19

Exanthem

Answer 19

• means “flower breaking out”
• used to describe a skin breakout that is due to internal disorder such as an infection or drug
  
  • i.e. viral exanthem

Question 20

Morbiliform

Answer 20

• “measles-like”
• maculopapular that becomes confluent

Question 21

Purpura

Answer 21

• visible hemorrhage into the skin or mucus membranes
• these are non-blanchable

Question 22

Petechiae

Answer 22

• less than or equal to 3mm and macular
• small purpura

Question 23

Ecchymosis

Answer 23

• usually >1cm
• trauma in the history is typical
• a hematoma is when it is palpable

Question 24

Levido Reticularis

Answer 24

• blue or discolored network
• think of Mallory’s legs during cold soccer workouts
  
  • pale with the blue and discolored network of lacy coloration

Question 25

Papulosquamous eruption

Answer 25

• well circumscribed papules, plaques with hyperkeratosis (scaling)
• often associated with:
  
  • psoriasis
  • pityriasis rosea
  • lichen planus
  • tinea corporis
  • seborrheic dermatitis