Cutaneous reaction pattern

Question 1

Affects extensors more than flexors

Answer 1

psoriasis vulgaris

Question 2

Fine branny desquamation at periphery of lesion

Answer 2

collarette scale (pityriasis rosea)

Question 3

New lesions form on the area where you scratched

Answer 3

Koebner’s phenomenon

Question 4

Lesion preceding pityriasis rosea

Answer 4

herald patch

Question 5

Koebner’s phenomenon seen in

Answer 5

psoriasis vulgaris

lichen planus

Question 6

Patches seen with fine scaling as skin is stretched

Answer 6

tinea versicolor

Question 7

Christmas tree pattern seen in

Answer 7

pityriasis rosea

Question 8

Auspitz sign is pathognomonic for

Answer 8

psoriasis vulgaris

Question 9

Great mimicker

Answer 9

secondary syphillis

Question 10

Histo hallmark: elongated rete ridges

Answer 10

psoriasis vulgaris

Question 11

psoriasis occurring in youths after URTI with beta hemolytic strep

Answer 11

guttate psoriasis

Question 12

Pathognomonic lesion: erythematous thin plaques with central clearing and well delineated raised borders on periphery

Answer 12

superficial fungal infection

Question 13

Lesions appearing like teardrops in psoriasis

Answer 13

guttate psoriasis

Question 14

Erythematous patches on soles and palms of teenager: suspect?

Answer 14

secondary syphillis

Question 15

Flexural sparing

Answer 15

ichthyosis vulgaris

Question 16

Fillagrin gene abnormality

Answer 16

ichthyosis vulgaris

Question 17

Autosomal dominant ichthyosis

Answer 17

ichthyosi vulgaris

Question 18

Colloidon baby

Answer 18

lamellar ichthyosis

Question 19

Mucosal sparing

Answer 19

lamellar ichthyosis

Question 20

polygonal papules with Wickham’s striae

Answer 20

lichen planus

Question 21

White and lacy mucosal involvement

Answer 21

lichen planus

Question 22

lichen simplex chronicus is secondary to

Answer 22

scratching

Question 23

Skin disorder with possible association with Hep C

Answer 23

lichen planus

Question 24

Irritant vs allergic contact dermatitis

Answer 24

irritant = first exposure

allergic = previous exposures

Question 25

fluid-filled lesion < 0.5 cm

Answer 25

vesicle

Question 26

fluid-filled lesion > 0.5 cm

Answer 26

bulla

Question 27

Its involvement in buccal mucosa --> erosive stomatitis --> oral squamous cell ca

Answer 27

lichen planus

Question 28

Affects extensors in children Flexors in adults

Answer 28

atopic dermatitits

Question 29

Tingling sensation or slight pain associated with fever and lymphadenopathy

Answer 29

HSV

Question 30

Dewdrop on a rose petal

Answer 30

varicella

Question 31

Nikolsky's sign positive

Answer 31

pemphigous diseases

Question 32

Tense bullae that resists rupture seen in elderly and found on lower abdomen, groin, and flexor surface

Answer 32

pemphigoid

Question 33

Initially vesicular, forms cloudy pustules

Answer 33

varicella

Question 34

Bullae erode and exfoliate

Answer 34

SJS

Question 35

>30% of total body SA involved

Answer 35

Toxic epidermal lysis

Question 36

Pressing the periphery of a bulla causes it to spread slight rubbing of the skin results in exfoliation of the outermost layer

Answer 36

Nikolsky's sign If negative --> pemphigoid

Question 37

Honey/amber colored crust formation usually due to Staph

Answer 37

impetigo

Question 38

Coalesced furuncles

Answer 38

carbuncles

Question 39

1st line of treatment for localized pustular skin lesions

Answer 39

cloxacillin

Question 40

Ulcerative tumor of head and neck

Answer 40

squamous cell CA | basal cell CA

Question 41

Bullous lesion with split above basal layer

Answer 41

pemphigus

Question 42

Bullous lesion with spilt below basal layer

Answer 42

pemphigoid

Question 43

inflammatory ulcer on trunk or extremeties

Answer 43

vasculitis

Question 44

infectious genital ulcer seen in

Answer 44

syphilis | chancroid

Question 45

Pemphigoid disease that is drug-induced or caused by HSV

Answer 45

SJS

Question 46

Acantholysis and intradermal bullae that easily rupture

Answer 46

pemphigus vulgaris

Question 47

Autoimmune blistering disease targeting antibodies in keratinocytes

Answer 47

pemphigus vulgaris

Question 48

Hard chancre? Soft chancre?

Answer 48

hard and painless = syphilis | soft and painful = chancroid

Question 49

non-infectious genital ulcer

Answer 49

fistula | Behcet's

Question 50

Rodent ulcer

Answer 50

basal cell CA

Question 51

Basal cell CA usually located on

Answer 51

nose | sun-exposed areas

Question 52

Poor prognosis skin CA

Answer 52

melanoma

Question 53

Head and neck CA with best prognosis

Answer 53

basal cell CA because it does not metastasize to organs but only to adjacent structures (7 to 15 year growth)

Question 54

Test for blanchability indicating whether a skin lesion is vascular(vasculitis, inflammatory) or non-vascular (hemorrhagic, nevus)

Answer 54

Diascopy

Question 55

Skin CA mistaken for fungal infection

Answer 55

squamous cell CA | may have scales or papulous eczema, look like psoriasis

Question 56

Ulcer on medial malleolar area suggests

Answer 56

venous stasis ulcers are tender with irregular borders

Question 57

RF for arterial ulcer

Answer 57

DM, smoking

Question 58

RF for venous ulcer

Answer 58

secondary to chronic venous insufficiency

Question 59

Diagnostic for Behcet where forearm is pricked with a small, sterile needle and the appearance of a small red bump or pustule 1-2 days later indicates (+)

Answer 59

pathergy

Question 60

Ulcer aggravated by elevation and relieved by dependence

Answer 60

arterial ulcer

Question 61

Aggravated by dependence and relieved by elevation

Answer 61

venous ulcer

Question 62

6 P's for arterial ulcers

Answer 62

``` Pain Pallor Pulse (diminished) Paralysis Paresthesia Poikilothermia (cold --> mottled appearance) ```