Dermatopathology

Question 1

Merkels cells

Answer 1

Function as mechanoreceptors

Question 2

Melanocytes

Answer 2

Pigment synthesizing cells

SUpply keratinocytes with melanin

Question 3

Langerhans cells

Answer 3

Scattered in suprabasal layer of epidermis
Immunogenic cells that recognize foreign antigens.
Bind antigen, send it to node

Question 4

Dermis

Answer 4

Mostly composed of collagen

Immune cells, nerves, vessels

Question 5

Eccrine (merocrine) glands

Answer 5

Sweat glands
Located over entire body
Open directly to skin surface

Question 6

Apocrine glands

Answer 6

Sweat glands
Open through a HAIR FOLLICLE
Less numerous
Secrete more of an oily substance

Question 7

Sebaceous Glands

Answer 7

Secrete sebum, an oily substance

Lubricates hair and skin

Question 8

Eponychium

Answer 8

Nail bed

Nail plate lies on top

Question 9

Primary lesions

Answer 9

Arise from previously normal skin

Question 10

Secondary lesion

Answer 10

Created by another process such as scratching or infxn

Question 11

Circumscribed flat lesion <1cm

Freckle

Answer 11

Macule

Question 12

Circumscribed flat lesion >1 cm

Answer 12

Patch

Question 13

Elevated solid lesion with variable color <.5 cm

Answer 13

Papule

Question 14

Raised, flat-topped superficial lesion where diameter is greater than the thickness. >.5 cm

Answer 14

Plaque

Often the product of a coalescence of papules

Question 15

Elevated lesion with a rounded surface.

.5 - 1-2 cm

Answer 15

Nodule

Generally deeper and firmer than papule

Question 16

Large nodule, >2 cm

Answer 16

Tumor

Question 17

Somewhat irregular, transient swelling due to local skin edema.

Answer 17

Wheal

Question 18

Fluid-filled lesion up to 1cm

Answer 18

Vesicle

Question 19

Serous-filled lesion >1cm

Answer 19

Bulla

Question 20

Circumscribed lesion filled w/ pus

Answer 20

Pustule

Question 21

Abnormal stratum corneum due to accumulation of or increased shedding of keratinocytes

Answer 21

Scales

Question 22

Dried serum, pus or blood

Answer 22

Crusts

Question 23

Partial loss of the epidermis

Answer 23

Erosion

Question 24

Full thickness loss of epidermis and at least some dermis, maybe all.

Answer 24

Ulcer

Question 25

Linear split in the epidermis and maybe the dermis

Answer 25

FIssure

Question 26

Localized damage to the skin due to scratching

Answer 26

Excoriation

Question 27

Plug of sebaceous gland and keratinized material lodged in opening of hair follicle (acne)

Answer 27

Comedones

Question 28

Small superficial keratin cyst w/ no visible opening

Answer 28

Milia

Question 29

Cavity lined with epithelium containing fluid, puss

Answer 29

Cyst

Question 30

Infected lesion surrounded by a membrane and filled with exudate

Answer 30

Abscess

Question 31

Narrow, elevated tortuous channel produced by parasite

Answer 31

Burrow

Question 32

Thickening of epidermis with increased skin markings due to scratching

Answer 32

Lichenification

Question 33

Surface contains a rounded depression in the center

Answer 33

Umbillicated

Question 34

Dilated superficial blood vessels

Answer 34

Telangectasia

Question 35

Circumscribed deposit of blood <1 cm

Answer 35

Petechiae

Question 36

Circumscribed deposit of blood >.5cm

Answer 36

Ecchymosis

Question 37

Inflammation of hair follicle, resulting in localized accumulation of pus and dead tissue

Answer 37

Boil or faruncle

Question 38

Clustered faruncles

Answer 38

Carbuncle