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General
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Terminology
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Epidemiology
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Sites
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Etiology
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Clinical features
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Case reports
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Treatment
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Clinical images
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Left great toe

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Middle finger

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Collarette of epidermis surrounds nodules

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Solitary, projecting keratotic mass

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Skin colored, pedunculated firm nodule protruding from right heel toward sole

Gross description
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Micro description
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Micro images
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Dome shaped tumor

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Collagen fibers perpendicularly arranged

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Acanthosis and massive orthokeratosis

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Thickened collagen

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Hyperkeratosis and acanthosis

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Proliferating fibroblasts and capillaries

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Compact orthokeratosis

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Various images




Courtesy of Hillary Elwood, M.D.

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Polypoid dermal proliferation

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Prominent dense collagen

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Vertically oriented collagen fibers



Stains
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Differential diagnosis
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End of Skin - Nonmelanocytic tumors > Benign (nonmelanotic) epidermal tumors or tumor-like lesions > Acquired digital fibrokeratoma



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