Intro to Dermatological Description and Diagnosis

Question 1

What is the primary lesion?

Answer 1

The most representative lesion of a disease; the focus of examination

Question 2

What is the secondary lesion?

Answer 2

Evolutionary changes that occur later in the course of skin disease, resulting from alteration of a primary lesion (trauma, infection)

Question 3

Answer 3

Macule: flat lesion which differs from surrounding skin b/c of its color

Question 4

Answer 4

Patch: flat lesion 1cm or larger

Question 5

Answer 5

Papule: raised bump <1cm

Question 6

Answer 6

Plaque: raised bump >1cm

Question 7

Answer 7

Vesicle: blister w/clear fluid inside, less than 1cm

Question 8

Answer 8

Bulla: blister with clear fluid over 1cm

Question 9

Answer 9

Nodule: a solid, deep palpable lesion

Question 10

Answer 10

Pustule: blister w/purulent exudative fluid

Question 11

Answer 11

Abscess: a large, localized collection of purulent material that is usually red, tender and warm

Question 12

Answer 12

Cyst; a sac, usually spherical, that contains liquid or a semisolid material

Question 13

Erosion

Answer 13

Loss of superficial epidermis

Question 14

Ulcer

Answer 14

loss of the entire epidermis

Question 15

Fissure

Answer 15

linear tear in the epidermis

Question 16

Scale

Answer 16

fragments of stratum corneum that are being shed from the skin

Question 17

Crust

Answer 17

serum and blood dried to the skin

Question 18

lichenification

Answer 18

thickening of the epidermis with accentuated skin markings

Question 19

Answer 19

erosions

Question 20

Answer 20

ulcer

Question 21

Answer 21

fissure

Question 22

Answer 22

scale

Question 23

Answer 23

crust

Question 24

Answer 24

lichenification

Question 25

Brown lesions

Answer 25

Melanin, accumulation of keratinocytes, hemosiderin

Question 26

Blue lesions

Answer 26

Melanin, deoxy hemoglobin, deposition of drugs or metals

Question 27

Erythema

Answer 27

increased bloodflow through skin; usually blanches

Question 28

Purple-red lesions

Answer 28

Petichia (small, <3cm red-purple non-blanching macules)

Purpura: red-purple, non-blanching, large macules, patches, and papules

*Both reflect extravasatio of erythrocytes

Question 29

Yellow lesions

Answer 29

Bile

Lipid

Question 30

Orange lesions

Answer 30

beta carotene

Question 31

Shape

Answer 31

targetoid

Question 32

shape?

Answer 32

annular

Question 33

Shape?

Answer 33

polycyclic

Question 34

shape?

Answer 34

linear

Question 35

shape?

Answer 35

grouped

Question 36

shape?

Answer 36

dermatomal / zosteriform

Question 37

shape?

Answer 37

blashkoid (embryonal)