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General
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Terminology
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Epidemiology
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Pathophysiology
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Treatment and prognosis
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Clinical features
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Clinical images
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Breast skin, courtesy of Dr. Mark R. Wick

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Dimpling when squeezed along margins

Dermoscopy description
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Dermoscopy images
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Pseudonetwork present

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Central white scar-like patch, pigmented network and many brown globules

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Different patterns

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Various images

Gross images
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Ulcerated cutaneous mas

Micro description
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Micro images
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Breast skin, courtesy of Dr. Mark R. Wick

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Tumor is more basophilic than surrounding dermis

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Basophilia is due to increased cellularity

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Sharp border between tumor and subcutis

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Tumor cells are composed of histiocyte-like cells and foam cells

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Tumor cells are mostly fibrous in this focus

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Fat may be entrapped at edge, but must differentiate from infiltration of DFSP

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Randomly arranged foam cells, fibroblasts and histiocyte-like cells; foam cells are somewhat specific for this lesion

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Less common finding of predominately foam cells and cholesterol clefts

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Various images

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H&E and D2-40

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Tumor with hyperplastic epithelium

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Hyperplastic epidermis and sclerotic stroma

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Foam cells with vacuolated cytoplasm

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Fibroblastic cells with vacuolated cytoplasm in collagenous stroma

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Spindle cell nodule

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Paucicellular dermal tumor

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Spindle cells in dense collagenous stroma

Positive stains
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Negative stains
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Molecular / cytogenetics description
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Differential diagnosis
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End of Soft Tissue > Fibrohistiocytic Tumors > Benign fibrous histiocytoma (superficial)



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