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Skin - Nonmelanocytic tumors

Vascular tumors

Bacillary angiomatosis


Reviewer: Christopher Hale, M.D. (see Reviewers page)
Revised: 16 July 2012, last major update July 2012
Copyright: (c) 2001-2012, PathologyOutlines.com, Inc.

General
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● Due to infection by Bartonella henselae
● May involve soft tissue, lymph nodes, internal organs
● May coexist with Kaposiís sarcoma
● Reactive but mimics a neoplasm, and commonly presents as multiple cutaneous neoplasms in HIV patients

Treatment
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● Antibiotics

Case reports
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● 36 year old man with AIDS, skin lesions, fever and weight loss (Can J Infect Dis Med Microbiol 2005;16:249)

Clinical images
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Exophytic lesion on neck


Small, cherry angiomata-like lesions and nodules on trunk

Gross description
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● Red papules/nodules

Micro description
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● Lobules of capillaries with epithelioid endothelial cells
● Also fragmented neutrophils, granular purple extracellular bacteria

Micro images
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Various images

Electron microscopy description
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● Bacteria with trilaminar cell walls (Can J Infect Dis Med Microbiol 2005;16:249)

Positive stains
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● Silver stains (bacteria)

Differential diagnosis
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● Verruga peruana
● Kaposi sarcoma

End of Skin - Nonmelanocytic tumors > Vascular tumors > Bacillary angiomatosis


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