dermatology

Question 1

secondary lesion

Answer 1

• changes in primary lesion

- usually resulting of more systemic illness i.e. psoriasis

Question 2

criteria of lesion

Answer 2

morphologic features, configuration, and distribution

Question 3

primary lesions

non palpable, flat

Answer 3

macule: 1 cm; vitiligo, cafe au lait spots

Question 4

primary skin lesions

palpable, solid mass

Answer 4

papule: 2 cm; neoplasms
plaque: flat, elevated, superficial papule with surface area> than height; psoriasis, seborreickeratosis
wheal: superficial area of cutaneous edema; hives, insect bites

Question 5

primary lesions

palpable, fluid filled

Answer 5

vesicle: 1 cm, filled with serous fluid; blister, pemphigus vulgaris
pustule: filled with pus; acne, impetigo

Question 6

special primary lesions

Answer 6

cornedo: plugged opening of sebaceous gland; blackhead
burrow: >10 mm, raised tunnel; scabies
cyst: palpable lesion filled with semiliquid material or fluid; sebaceous cyst
abscess: localized accumulation of purulent material in dermis or subcutis-usually pus so deep unable to visualize from surface
furuncle: necrotizing form or inflammation of hair follicle
carbuncle: coalescence of several furuncles
milia: keratin-filled cysts on distal part of sweat gland

Question 7

secondary lesion

below skin plane

Answer 7

erosion: loss of part/all of epidermis, surface is moist; rupture of vesicle
ulcer: loss of epidermis and dermis, may bleed; stasis ulcer, chancre
fissure: linear cracks from epidermis to dermis; cheilitis, athlete’s foot
excoriation: superficial linear, “duggout”, traumatized area, usually self-induced; abrasion, scratch
atrophy: thinning of skin with loss of skin markings; striae
sclerosis: diffuse or circumscribed hardening of skin

Question 8

secondary lesion

above plane

Answer 8

scaling: heaped-up keratinized cells, exfoliated epidermis; dandruff, psoriasis
crusting: dried residue of pus, serum, or blood; scabs, impetigo

Question 9

vascular skin lesions

Answer 9

erythema: pink/red blanchable discoloration of skin secondary to dilation of blood vessels
petechiae: nonblanchable, .5 cm; intravascular defects
ecchymosis: nonblanching, variable in size; trauma, vasculitis
telangiectasia: fine, irregular dilated blood vessels; dilation of capillaries
spider angioma: central red body with radiating spider-like arms; liver disease, estrogens

Question 10

miscellaneous skin lesion

Answer 10

scar: replacement of destroyed dermis by fibrous tissues, may be atrophic or hyperplastic; healed wound
keloid: elevated, enlarging scar growing beyond boundaries of wound; burn scars
lichenification: roughening/thickening of epidermis, accentuated skin markings; atopic dermatitis

Question 11

primary lesion

Answer 11

• first response of body to skin

- result from anatomical changes in skin