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DERM > Differential Diagnosis > Flashcards

Differential Diagnosis Flashcards

1
Q

macule - define

A

circumscribed change in without elevation/depression (flat change in color)

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2
Q

patch - define

A

flat change in color > 1cm

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3
Q

papule - define

A

elevated area of skin < 1 cm

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4
Q

plaque - definition

A

elevated area of skin > 1 cm

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5
Q

nodule - definition

A

deep seated mass in the deep dermis / subcutis > 1 cm

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6
Q

tumor - definition

A

raised collection of cells > 1 cm

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7
Q

wheal - definition

A

elevation of the skin with fluid. is firm & edematous

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8
Q

what are the dermatological terms use to describe color changes and how are they different?

A
  • macule: flat change in color < 1 cm
  • patch: flat change in color > 1 cm
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9
Q

what are the dermatological terms used to describe elevations in skin and how are they different?

A
  • papule: elevation < 1 cm
  • patch: elevation > 1 cm
  • nodule: elevation > 1 cm that is deep seated in deep dermis / subcutis
  • wheel: elevation that is infiltrated w/ fluid
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10
Q

identify & classify lesion

A

lengito

a macule

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11
Q

identify & classify lesion

A

ash leaf macule

macule

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12
Q

identify & classify lesion

A

idiopathic guttate hypomelanosis

macule

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13
Q

identify & classify lesion

A

vitilgo

patch

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14
Q

identify & classify lesion

A

sebacceous hyperplasia

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15
Q

identify & classify lesion

A

cherry angioma

maculopapular lesion

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16
Q

identify & classify lesion

A

sebhorreic keratosis

maculopapular lesion

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17
Q

identify & classify lesion

A

wart

maculopapular

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18
Q

identify & classify lesion

A

molluscum contagiousum

maculopapular - is also umbilicated

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19
Q

identify & classify lesion

A

basal cell carcinoma

maculopapular lesion - pearly with telangectasia

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20
Q

identify & classify lesion

A

lichen plantis

maculopapular lesion - characterized by inflammatory infiltrate

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21
Q

identify

A

lichen sclerosis - microscopic

maculopapular lesion characterized by inflammatory infiltrate

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22
Q

identify & classify lesion

A

psoriasis

a plaque

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23
Q

identify & classify lesion

A

eczema

a plaque

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24
Q

identify & classify lesion

A

tinea corporis (fungal)

plaque

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25
Q

identify & classify lesion

A

mycosis fungoides

a plaque

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26
Q

identify & classify lesion

A

pityriasis rosea

a plaque

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27
Q

identify & classify lesion

A

paget’s disease

a plaque

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28
Q

identify & classify

A

nodulocystic acne

nodule

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29
Q

identify & classify

A

nodulocystic acne

nodule

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30
Q
A

neurofibromas

nodule

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31
Q

identify & classify

A

prurigo nodularis

nodule

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32
Q

identify & classify

A

nodule

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33
Q

identify & classify

A

keloids - overzellous production of collagen by fibroblasts

nodule

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34
Q

identify & classify

A

keloids - overzellous production of collagen by fibroblasts

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35
Q

identify & classify

A

dermatographism: mast cells require miminal stimulation to release histamine - skin flares after gentle stroke

a wheel

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36
Q

identify & classify

A

urticaria

wheel

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37
Q

identify & classify

A

urticaria

wheel

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38
Q

identify & classify

A

urticaria

a wheel

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39
Q

vesicle - definition

A

a thin walled elevated lesion containing fluid < 1 cm

40
Q

identify & classify

A
  • progression of chicken-pox
    • initial infection - chicken-pox
    • recurrent infection - herpes zoster
    • lastly - hypopigmentation
  • a vesicle
41
Q

bullae - definition

A

vesicle (a thin walled, fluid containing elevated lesion) > 1 cm

42
Q

identify & classify

A

bullous pemphigoid

bullae

43
Q

identify & classify

A

bullous pemphigoid

bullae

44
Q
A

pemphigus vulgaris

bullae, with sloughing

45
Q

pustule - definition

A

a vesicle containing WBCS which gives it white / yellow fluid content

46
Q

identify & classify

A

folliculitis

pustule

47
Q

identify & classify

A

acne

pustule

48
Q

identify & classify

A

dyshidrosis

pustule

49
Q

scale - definition

A

secondary lesions characterized by epidermal cells that are peeling off in groups

50
Q
A

eczema craquele - common in nursing homes d/t dehydration

scale

51
Q

identify & classify

A

staphyloccocal scalded skin syndrome (desquamation)

a scale

52
Q

identify & classify

A

psoriasis (silvery)

a scale (also a patch)

53
Q

identify & classify

A

ichthyosis

scale

54
Q

crusting - definition

A

dry/moist material on the skin surface

55
Q

identify & classify

A

impetigo (honey colored crust)

crusting

56
Q

identify & classify

A

herpes simplex crusting

crust

57
Q

identify & classify

A

tinea pedis - crusting of the feet

crusting

58
Q

fissure - definition

A

deep linear split extending through the epidermis into the dermis

59
Q

identify & classify

A

eczema fissure

fissure

60
Q

identify & classify

A

perleche - lateral commissure of the mouth

fissure

61
Q

identify & classify

A

intertrigo

fissure

62
Q

erosion - definition

A

a depressed area that reflects a partial or full thickness loss of epidermis (does not penetrate below the DEJ)

63
Q

identify & classify

A

neurotic excoriations

erosions

64
Q

identify & classify

A

candidiasis

erosion

65
Q

identify & classify

A

tinea pedis

erosion

66
Q

ulcer - definition

A

focal loss of epidermis & dermis

67
Q

identify & classify

68
Q

identify & classify

A

chancroid

ulcer

69
Q

identify & classify

A

pyoderma gangrenosum

ulcer

70
Q

excoritation - definition

A

an erosion caused by scratching

71
Q

scar - definition

A

an area of replacement of fibrosis (collagen) of the dermis / subcutaneous tissues resulting from a destructive process

72
Q

identify & classify

A

hidradenitis suppurativa - associated with glands in the axilla

scar

73
Q

identify & classify

A

porphyria - milia produced by scar, likely d/t hepatitis C

scar

74
Q

atrophy - definition

A

depression of epidermis & dermis d/t thinning of the skin

75
Q

identify & classify

A

morphea - localized scleroderma

atrophy

76
Q

identify & classify

A

atrophy d/t use of topical / intralesion steroids

atrophy

77
Q

identify & classify

A

lichen sclerosis

atrophy

78
Q

identify & classify

A

striae - atrophy d/t high levels of steroids

atrophy

79
Q

identify & classify

A

a comedone: a plug of _sebaceous materia_l lodged into the opening of a hair follicle

  • dilated follicular orifice: blackhead
  • narrowed follicular orifice: whitehead
80
Q

identify & classify

A

lichenification - an area of thickened apidermis induced by scratching: skin lines are acccentuated to produce “washboard” surface

81
Q

telangiectasia - definition

A

dilated superfiical blood vessels

82
Q

milia - definition

A

a small, superficial keratin cyst with no visible opening

83
Q

petechia - definition

A

a cirumscrbied deposit of blood less thsn 0.5 cm in diameter

84
Q

purpura - definition

A

a circumscribed deposit of blood greater than 0.5 cm

85
Q

maceration - definition

A

maceration - softening / breaking down of the skin resulting from prolonged exposure to moisture

86
Q

identify & classify

A

telangiectasia rosaccea

telangiectasia (dilated superificial lood vessels)

87
Q

identify & classify

A

spider angioma

telangiectasia (dilated superficial blood vessels)

88
Q
A

a milia - often d/t use ot oil based proeducts.

milia (small, superfiical keratin cyst with no visible opening)

89
Q

identify & classify

A

henoch-schonlein purpura

petechia (small, circumscribed deposit of blood < 0.5 cm in diameter)

90
Q

identify & classify

A

actinic purpura

purpura (circumscribed deposit of blood > 0.5 cm in diameter)

91
Q

identify & classify

A

meningococcemia

purpura (circumscribed deposit of blood > 0.5 cm in diameter)

92
Q

identify & classify

A

maceration - softening & breaking down of skin resulting from prolonged exposure to moisture

93
Q

classify & identify

A

granulmona annular, tinea

annular

94
Q

identify & classify

A

lichen plannus

linear

95
Q

identify & classify

A

lichen striatus

linear

96
Q
A

psorasis

micaceous plaque with silvery scale

97
Q
A

basal cell carcinoma: telangectatious macular plaque

DERM (6 decks)

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