derm

Question 1

define macule

Answer 1

flat lesion with diameter <2cm

Question 2

define patch

Answer 2

flat lesion diameter >2cm

Question 3

define papule?

Answer 3

circumscribed raised lesion 0.5-1cm in diameter

Question 4

deifne nodule?

Answer 4

circumscribed raised lesion >1cm in diameter

Question 5

describe a plaque?

Answer 5

circumscribed superficial elevated plateau area 1cm-2cm in diameter

Question 6

define hemangioma?

Answer 6

vascular papular or nodule (circumscribed raised lesion)

Question 7

describe vesicle?

Answer 7

raised lesion with clear fluid <05.cm

Question 8

describe bulla?

Answer 8

raised lesion with clear fluid>0.5cm

Question 9

describe ulceration?

Answer 9

loss of whole thickness of epidermis and upper dermis

Question 10

describe excorication?

Answer 10

partial or complete loss of epidermis as a result of scratching

Question 11

describe desquamation?

Answer 11

peeling of superficial scale often following acute inflammation

Question 12

describe annular lesions?

Answer 12

ring shaped

Question 13

describe discoid lesions?

Answer 13

coin shaped lesions

Question 14

ddx for viral diseases that cause blisters?

Answer 14

chicken pox, HFM, Herpes simplex

Question 15

Ddx for bacterial lesions that cause blisters?

Answer 15

impetigo/acute cellulitis

Question 16

Ddx for vesicles with inflammatory disorders?

Answer 16

eczema, contact dermatitis, insect bite reactions

Question 17

ddx for immunological disorders and metabolic disorders with vesicles?

Answer 17

dermatitis hepetiformis, pemphigus, pemphigoid, and erythema multiforme. Metabolic - porphyria

Question 18

ddx for erythema multiforme?

Answer 18

HSV< mycoplasma pneumoniae, hepatitis B/C, boreliosis,

Question 19

ddx for pyoderma gangrenosum?

Answer 19

monoclonal gammopathy, rheumatoid arthritis, leukemia, IBD, hodgkins lymphoma, behcet disease

Question 20

describe toxic erythema?

Answer 20

widespread symmetrical rash with maculopapular erythema, like morbiliform.

Question 21

ddx for toxic erythema?

Answer 21

viruses: measles, rubella, EBV, parvo, HHV6, dengue, typhi.
Bacterial: scarlet fever, RMS< trypanosomiasis

Question 22

ddx for erythema nodosum infectious causes?

Answer 22

streptococcus, mycoplasma pneumoniae, histo, blasto,TB, coccidio.

Question 23

ddx for erythema nodosum noninfectious causes?

Answer 23

IBD, sarcoidosis, behcet, hodgkin disease