Morphology

Question 1

identify the morphology of this lesion

Answer 1

MACULE

Question 2

examples of macules

Answer 2

freckles, flat moles, the rashes of rickettsial infections, rubella, measles

Question 3

describe a macule

Answer 3

flat, circumscribed

<1cm in diameter

hypo or hyper pigmented

can be other colors (pink, red, violet)

Question 4

identify the morphology of this lesion

Answer 4

patch

Question 5

describe a patch

Answer 5

flat, circumscribed

>1cm in diameter

hypo or hyper pigmented

also other colors

a bigger macule

Question 6

examples of a patch

Answer 6

tattoos, port-wine stains, cafe-au-lait spots

Question 7

identify the morphology of this lesion

Answer 7

papule

Question 8

describe a papule

Answer 8

elevated lesions

<1cm in diameter

palpable

thickening of epidermis and/or cells or deposits within dermis

may have secondary changes

distinguish from vesicle or pustule

Question 9

what are examples of papules

Answer 9

nevi, warts, lichen planus, insect bites, seborrheic keratoses, actinic keratoses, some lesions of acne, and skin cancers

Question 10

identify the morphology of this lesion

Answer 10

plaque

Question 11

describe a plaque

Answer 11

elevated, circumscribed

>1 cm in diameter

elevation due to increased thickness of the epidermis and/or cells or deposits within the dermis

may have secondary changes (e.g. scale, crust)

bigger papule

Question 12

what are examples of plaques?

Answer 12

Lesions of psoriasis and granuloma annulare

Question 13

identify the morphology of this lesion

Answer 13

nodule

Question 14

describe a nodule

Answer 14

elevated, circumscribed

larger volume than papule, often >2cm in diameter

involves the dermis, may extend to subcutis

greatest mass may be beneath the skin surface

Question 15

what are some examples of nodules?

Answer 15

cysts, lipomas, and fibromas

Question 16

identify the morphology of this lesion

Answer 16

vesicles

Question 17

what are examples of vesicles?

Answer 17

herpes infections, acute allergic contact dermatitis

Question 18

describe a vesicle

Answer 18

elevated, circumscribed

<1cm in diameter

primarily filled with clear fluid

may become pustular, umbilicated or an erosion

Question 19

identify the morphology of this lesion

Answer 19

bulla

Question 20

describe a bulla

Answer 20

elevated, circumscribed

>1cm in diameter

filled with clear fluid

Question 21

what are some examples of bulla?

Answer 21

burns, bites, irritant contact dermatitis or allergic contact dermatitis, and drug reactions

Question 22

identify the morphology of this lesion

Answer 22

pustule

Question 23

describe a pustule

Answer 23

elevated, circumscrived

usually <1cm in diameter

filled primarily with purulent fluid

Question 24

describe the morphology of this lesion

Answer 24

crust

dried serum, blood or pus

Question 25

when is crusting often seen?

Answer 25

secondary skin changes from inflammatory or infectious skin diseases

Question 26

describe the morphology of this lesion

Answer 26

scale

Question 27

what 5 pruritic conditions present as macules/papules/plaques?

Answer 27

xerosis atopic dermatitis nummular dermatitis seborrheic dermatitis stasis dermatitis

Question 28

what 3 pruritic conditions present as vesicles/bullae?

Answer 28

varicella zoster dermatitis herpetiformis bullous pemphigold

Question 29

what pruritic condition present as wheals/hives?

Answer 29

urticaria

Question 30

what secondary skin change is this?

Answer 30

excoriation

Question 31

what secondary skin change is this?

Answer 31

loss of the epidermis and at least part of the dermis infections, vasculitis etc.

Question 32

what secondary skin change is this?

Answer 32

fissure

Question 33

what secondary change is seen here?

Answer 33

erosion

Question 34

what secondary skin change is seen here?

Answer 34

atrophy

Question 35

what secondary skin change is seen here?

Answer 35

lichenification

Question 36

what distribution pattern is seen here?

Answer 36

annular

Question 37

what distribution pattern is seen here?

Answer 37

retiform

Question 38

what distribution pattern is seen here?

Answer 38

serpiginous

Question 39

what distribution pattern is seen here?

Answer 39

clustered

Question 40

what distribution pattern is seen here?

Answer 40

reticulated

Question 41

what distribution pattern is seen here?

Answer 41

linear

Question 42

what skin pattern is seen here?

Answer 42

Blaschko's lines