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Lymph nodes - not lymphoma
Neoplasms (excludes lymphoma)
Kaposi sarcoma

Reviewer: William D. DePond, M.D. (see Reviewers page)
Revised: 9 April 2014, last major update June 2006
Copyright: (c) 2003-2013, PathologyOutlines.com, Inc.

General
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Case reports
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Gross description
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Micro description
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Micro images
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Peripheral tumor deposits

Well circumscribed tumor nodule

Well circumscribed tumor and adjacent follicular hyperplasia

Well circumscribed tumor with adjacent sinus histiocytosis

Interlacing bundles of spindle cells separated by vascular slits containing extravasated red blood cells


Extreme vascularity with dilated and blood filled channels

Predominantly sinusoidal spread of tumor surrounding follicles with hyperplastic germinal centers

Tumor (arrow) extends along sinusoids towards reactive follicles

Kaposi’s sarcoma (upper right), lymphoma (lower left) and plasma cells (arrow)



Case of the Week #307:

CD31

HHV8


Other sites-

PAS+ hyaline globules

CD34 highlights vessels

Skin



Cytology images
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Case of the Week #307

Positive stains
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Negative stains
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Molecular description
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Differential diagnosis
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Additional references
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End of Lymph nodes - not lymphoma > Neoplasms (excludes lymphoma)> Kaposi sarcoma


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