Dermopathophysiology

Question 1

What are the layers of the skin?

Answer 1

Epidermis and Dermis. The hypodermis is not part of the skin

Question 2

What are the 5 layers of the epidermis

Answer 2

Deep to superficial:

1. Basale ( mitotic, melanocytes)
2. Spinosum
3. Granulosum
4. Lucidium ( only in hands, feet)
5. Corneum

Question 3

What type of epithelial tissue is the epidermis made of

Answer 3

keratinized, stratified squamos

Question 4

How does the epidermis gets its blood supply?

Answer 4

by diffusion from the dermis layer of skin

Question 5

What type of tissue is the Dermis?

Answer 5

Connective

Question 6

2 layers of dermis

Answer 6

1. Papillary ( closer to epidermis)

2. Reticular

Question 7

What is found in dermis?

Answer 7

1. dermal papillae ridges

2. sweat glands, hair follicles, blood vessels, touch receptors, etc.

Question 8

Macule vs. Patch

Answer 8

skin lesions that are flat and discolored. Macule is < 1 cm and Patch is > 1 cm
A birthmark is an example of a macule

Question 9

Papule vs. Plaque

Answer 9

Skin lesions that are elevated. Papule is < 1 cm and Plaque is > 1 cm

Question 10

Nodule vs. Plaque

Answer 10

Skin lesions that are elevated and > 1 cm. Nodule are deep with spherical edge and Plaque is NOT

Question 11

Vesicles vs. Bullae

Answer 11

Skin lesions that are elevated and fluid filled. Vesicle is < 1 cm and Bullae is > 1 cm

Question 12

Pustule

Answer 12

Puss-filled lesion of variable size.

A pimple is an example

Question 13

Wheal

Answer 13

A hive. transient, elevated lesion with erythema & pruritis

Question 14

Erythema

Answer 14

redness

Question 15

Pruritis

Answer 15

itchiness

Question 16

Nodule

Answer 16

Elevated and deep lesion with spherical edge that is > 1 cm

A swollen lymph node is an example

Question 17

Excoriation

Answer 17

lesion caused by sratching

Question 18

Lichenification

Answer 18

thickened and rough skin due to rubbing or irritation

Question 19

Scale

Answer 19

dry, flakes of keratin

Question 20

Erosion

Answer 20

loss of parts of epidermis

Question 21

Ulcer

Answer 21

loss of parts of dermis

Question 22

How are lesion classified/described?

Answer 22

History of lesion, inspection, and palpatation is important

1. Location
2. Size
3. Elevated or flat
4. Fluid or no fluid present
5. Color

Question 23

Functions of the Skin

Answer 23

1. Protection ( chemical, physical, and biological)
2. Temperature
3. Sensation