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Dermatology > Describing Skin Lesions Lecture Powerpoint > Flashcards

Describing Skin Lesions Lecture Powerpoint Flashcards

This better be easier than nephrology damn it

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1
Q

Skin lesion morphology definition

A

The form and structure of a skin lesion

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2
Q

It is important to inspect the skin using both ___ and ___ inspection and describe findings using correct descriptive terms

A

Visualization (using tangential lighting, etc), tactile sensation (checking for blanching, feeling for bumps)

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3
Q

Primary skin lesion vs secondary skin lesion

A

Primary are physical changes to the skin considered to be directly resultant from the disease process, secondary are evolved from primary lesions or caused by external forces such as scratching, trauma, infection or healing

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4
Q

Example of primary skin lesion vs secondary skin lesion

A

Bug bite causing papule is primary skin lesion, excoriations from scratching the itchy bite is a secondary skin lesion

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5
Q

Macule definition

A

A flat, unpalpatable circumscribed discoloration from normal skin <1cm

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6
Q

Patch definition

A

A flat, inpalpatable circumscribed discoloration from normal skin >1cm

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7
Q

What condition is this and what type of morphology does it demonstrate?

A

Vitiligo, patch

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8
Q

Papule definition

A

A discreet, solid, elevated skin lesion of varying color <1cm

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9
Q

Plaque definition

A

A discreet, solid, elevated skin lesion of varying color >1cm

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10
Q

A way to tell if a plaque is in fact raised above the skin surface

A

Shine a light tangentially and inspect from side for a shadow

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11
Q

What condition is this and what type of morphology does it have?

A

Psoriasis, plaque

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12
Q

Cyst definition

A

A closed cavity or sac with fluid or semisolid material <1cm

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13
Q

Nodule definition

A

A closed cavity or sac with fluid or semisolid material >1cm

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14
Q

Sometimes a large nodule is referred to as a…

A

…tumor

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15
Q

Cysts and nodules can occur in these dermatological layers (3)

A

Epidermis

Dermis

Hypodermis

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16
Q

Wheal definition

A

An area of edema in the upper epidermis presenting uniquely as a raised, erythematous lesion

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17
Q

What are these lesions called?

A

Wheals

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18
Q

Crust definition

A

A hardened layer of serum, blood, and purulent exudate appearing lesion on the skin

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19
Q

What condition is this and what morphology is it classified as?

A

Impetigo, crust

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20
Q

Scale definition

A

A build up of excess stratum corneum creating hard, dry plaques

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21
Q

Lichenification Definition

A

Accentuation of normal skin lines thru thickening of skin, often the result of chronic scratching

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22
Q

What secondary lesion morphology is this resulting from atopic dermatitis scratching?

A

Lichenification

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23
Q

Burrows definition

A

Linear tunnels appearing in the epidermis as result of a parasite digging into the skin

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24
Q

Where is scabies often seen, where is it almost never seen?

A

Often seen in skin folds particularly webbing of toes and fingers, almost never seen above the neck except rarely in infants

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25
Q

What condition is this and what type of morphology does it display?

A

Scabies infection, burrows

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26
Q

Vesicle definition

A

A fluid filled lesion <1cm

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27
Q

Bullae definition

A

A fluid filled lesion >1cm

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28
Q

What morphology is this skin lesion?

A

Vesicle

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29
Q

What morphology is this skin lesion?

A

Bulla

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30
Q

What is the condition and morphology associated of the image?

A

HSV, vesicles

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31
Q

Pustule definition

A

A fluid, pus filled skin lesion <1cm

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32
Q

Abscess defintion

A

A fluid and pus filled lesion >1cm

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33
Q

What is the condition and morphology associated with this image?

A

MRSA infection, abscess

34
Q

A lot of people mistake a MRSA infection as a…

A

…spiderbite

35
Q

Furuncle definition

A

A boil, a skin abscess typically caused by staph infection that invades a hair follicle and surrounding tissue

36
Q

Carbuncle definition

A

Clusters of boils (furuncles) connected subcutaneously from typically MRSA infected hair follicles

37
Q

What morphology is this skin lesion?

A

Furuncle

38
Q

Erythema definition

A

Localized increased blood flow to the skin causing a red appearance

39
Q

Erythroderma definition

A

Generalized increased blood flow to all of epidermis resulting in red coloration

40
Q

How do we tell the difference between erythema and ecchymoses?

A

If it blanches, it is still contained in the vessel and is erythema (increased blood flow), if it doesn’t, it has spilled out of the vessel and is a bruise

41
Q

What condition is this and what morphology is the skin displaying?

A

Roseacea, erythema

42
Q

Telangiectasias defintion

A

Small, permanent dilated superficial blood vessels on the skin, sometimes a sign of hepatic disease but often environmental exposure

43
Q

What disease state is this?

A

Basal cell carcinoma

44
Q

Ecchymosis definition

A

A type of purpura, nonblanchable rupturing of small capillaries beneath the skin resulting in accumulation of blood in the surrounding tissues often appearing dark blue in color

45
Q

Purpura definition

A

Blood spots or skin hemorrhages, class of purple colored spots recognizable on the skin including ecchymoses and petachiae

46
Q

What morphology is this skin lesion?

A

Ecchymosis

47
Q

Petechiae definition

A

A type of purpura, small 1-2mm nonblanchable macules of tiny hemorrhages under the skin

48
Q

Palpable purpura definition

A

Raised palpable discoloration due to vasculitis in the skin creating nonblanchable blood filled lesions

49
Q

Henoch-schonlein purpura definition

A

A rare inflammatory disorder of small blood vessels most commonly occuring in children resulting in disseminated purpura in lower extremities

50
Q

What condition is this?

A

Henoch schonlein purpura

51
Q

Atrophy definition (derm), what is an example of what causes it?

A

A weakning and thinning of skin layers appearing as a sunken lesion

Often due to repeated activity such as insulin injections in the same spot

52
Q

Fissure definition

A

Sharp linear crack in the epidermis resulting in sunken in lesion appearance

53
Q

What is this condition and when is it often seen?

A

anal fissure, often seen with constipation

54
Q

What dermatologic condition is this called?

A

Atrophy of the epidermis

55
Q

Erosion definition

A

A localized loss of epidermal epithelium and part of dermis that upon healing does not scar over

56
Q

Ulcer definition

A

A circumscribed loss of epidermis that heals with scarring of tissue

57
Q

Ulcerations often appear underneath…

A

….vesicles or bullae or other raised skin lesions

58
Q

Eschar definition

A

Hardened crust and plaque covering an ulcer of necrotic tissue, giving it a characteristic black appearance

59
Q

Gangrene definition

A

Black, dead, necrotic tissue

60
Q

What morphology is this lesion?

A

Ulcer

61
Q

What condition is this lesion?

A

Erosion

62
Q

What condition is this lesion?

A

Eschar

63
Q

Scar definition

A

Permanent fibrotic changes that occur following damage to the dermis of the skin

64
Q

Keloid definition

A

Exaggerated connective tissue response to injured skin that extends beyond the original wound’s edges, some form them and others do not, recurrent in almost all cases

65
Q

What condition is this skin lesion?

A

Keloid

66
Q

Striae definition

A

Stretch marks, irregular areas of skin due to distension from extreme weight gain or loss

67
Q

Acral distribution definition

A

On the tips of fingers, toes, ears

68
Q

Dermatomal distribution definition and what is its other name?

A

Along a dermatome on the skin, zosterform

69
Q

Intertriginous distribution definition

A

Within skin folds and creases

70
Q

Lymphangitis distribution definition

A

Following along a lymph channel of the extremities

71
Q

Photodistributed distribution definition

A

Along the skin lines exposed to sunlight

72
Q

Glove and stocking distribution definition

A

Hands and feet only

73
Q

What distributuion is this?

A

Acral

74
Q

What distribution is this?

A

Intertriginous

75
Q

Configuration definition

A

How skin lesions are organized and related to one another

76
Q

Annular configuration definition

A

ring shaped

77
Q

Arciform configuration definition

A

Arc shaped

78
Q

Polycyclic configuration definition

A

Coalescing rings and arcs

79
Q

Reticular configuration definition

A

Net like

80
Q

Targetoid configuration definition

A

Bullseye appearance

81
Q

Color considerations when classifying a lesion

A
  • single or multicolored
  • hyper or hypopigmented
  • what color
82
Q
A

Dermatology (18 decks)

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