Pathology concepts

Question 1

Bulla

Answer 1

Blister or large skin vesicle, bigger than 1 cm

Question 2

Excoriation

Answer 2

Superficial skin defect caused by scratching

Question 3

Fissure

Answer 3

Sharp-edged defect of epidermis that extends into deeper layers of the skin

Question 4

Macule

Answer 4

Flat lesion, less than 2 cm (freckle)

Question 5

Papule

Answer 5

Slightly elevated, small induration of the skin, less than 1 cm, eczema

Question 6

Nodule

Answer 6

Similar to papule but larger (1-5 cm), moles or

Question 7

Petechia

Answer 7

Pinpoint intradermal or subcutaneous skin hemorrhage

Question 8

Patch

Answer 8

Similar to macule but larger than 2 cm

Question 9

Pustule

Answer 9

Vesicle filled with pus

Question 10

Scale

Answer 10

Keratin layers that cover the skin in flakes or sheets and can be easily scraped away

Question 11

Scar

Answer 11

Formation of fibrous tissue following healing of inflammation or injury

Question 12

Tumor

Answer 12

Nodule exceeding 5cm

Question 13

Ulcer

Answer 13

Defect of epidermis

Question 14

Vesicle

Answer 14

Fluid-filled elevation of the epidermis measuring less than 1 cm

Question 15

Crust

Answer 15

Skin defect that is covered with coagulated plasma or blood (scab)

Question 16

Urticaria

Answer 16

Pruritic skin eruption characterized by transient lesions (wheals) of varying shapes and sizes with well defined erythematous margins and pale centres (hives)

Question 17

Cyst

Answer 17

Closed sac in or under the skin lined with epithelium and containing fluid or semisolid material

Question 18

Plaque

Answer 18

Flat often raised patch on the skin or any other organ of the body

Question 19

Nail clubbing

Answer 19

“upside down spoons”

Question 20

Lice

Answer 20

EW