Primary Lesions

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Last updated 4:08 PM on 5/29/26

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12 Terms

1

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Macule

a color change, flat, circumscribed <1cm (freckles)

<p>a color change, flat, circumscribed <1cm (freckles)</p>

2

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Patch

macules > 1cm, flat

<p>macules > 1cm, flat</p>

3

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Papule

solid, elevated hard or soft, <1cm

<p>solid, elevated hard or soft, <1cm</p>

4

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Plaque

papules coalesce to form an area >1cm (psoriasis)

<p>papules coalesce to form an area >1cm (psoriasis)</p>

5

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Nodule

solid, elevated hard or soft, larger than 1 cm

<p>solid, elevated hard or soft, larger than 1 cm</p>

6

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wheal

superficial, raised, transient and erythematous, irregular shape from edema (mosquito bite, allergic rx)

<p>superficial, raised, transient and erythematous, irregular shape from edema (mosquito bite, allergic rx)</p>

7

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Tumor

> a few cm, firm or soft, deeper into dermis, benign or cancerous

<p>> a few cm, firm or soft, deeper into dermis, benign or cancerous</p>

8

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Urticaria

wheals that coalesce, extensive rx, pruritic

<p>wheals that coalesce, extensive rx, pruritic</p>

9

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Vesicle

elevated cavity holding fluid, up to 1 cm (blisters, herpes)

<p>elevated cavity holding fluid, up to 1 cm (blisters, herpes)</p>

10

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Bulla

>1cm, superficial in epidermis (contact dermatitis, burns)

<p>>1cm, superficial in epidermis (contact dermatitis, burns)</p>

11

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Cyst

encapsulated, fluid filled

<p>encapsulated, fluid filled</p>

12

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pustule

pus in a cavity (made up of cellular debris and infectious material)

<p>pus in a cavity (made up of cellular debris and infectious material)</p>