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General
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Treatment
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Clinical images
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Capillary hemangioma, breast skin, courtesy of Dr. Mark R. Wick

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Diffuse dermal angiomatosis

Gross images
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Angiomatosis composed of vessels (arrows) and breast parenchyma

Micro images
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Epithelioid, courtesy of Dr. Mark R. Wick

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Lobular capillary, courtesy of Dr. Mark R. Wick

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Tufted, courtesy of Dr. Mark R. Wick

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Venous, courtesy of Dr. Mark R. Wick



Angiomatosis

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Dilated vascular channels in breast tissue

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Anastomosing vascular channels, flat endothelial cells, no smooth muscle

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Diffuse dermal angiomatosis (H&E and CD31)



Atypical hemangioma

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Cavernous hemangioma above and branching vascular channels below

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Cavernous vessels infiltrating into fat

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Branching vascular channels lined by bland endothelium

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Various images



Capillary hemangioma

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Thin walled vessels of various sizes with bland endothelium and complex branching vessels are suggestive of granuloma pyogenicum but without inflammation



Cavernous hemangioma

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Well circumscribed with dilated vascular channels, lobular-like pattern of dilated vessels but no anastomosing channel, vascular spaces are lined by inconspicuous endothelium; organizing clot with recanalization, no/rare Ki-67 staining



Perilobular hemangioma

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Thin walled vessels are congested and extend into adjacent fat

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Lesion in stroma is not lobules or ducts



Atypical perilobular hemangioma

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Compact vascular proliferation associated with terminal duct

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Extension into fat and no distinct congested capillary channels

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Inconspicuous slit-like vascular spaces lacking red blood cells

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Hyperchromatic endothelial nuclei

Videos
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Additional references
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End of Breast - nonmalignant > Benign tumors / changes > Hemangioma and angiomatosis of breast



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