Cardiac tumors - benign

Author: Nat Pernick, M.D. (see Authors page)

Revised: 20 March 2018, last major update November 2013

Copyright: (c) 2007-2018, PathologyOutlines.com, Inc.

PubMed Search: Varix [title] heart

Cite this page: Pernick, N. Varix. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/hearttumorvarix.html. Accessed July 21st, 2018.
Definition / general
  • Usually dilated thrombosed vein in right atrium that arises from inferior rim of fossa ovalis
  • Incidence varies from 0.1% to 2.5% at autopsy
  • Asymptomatic
Case reports
Gross description
  • Blue, raised area inferior to fossa ovalis
Gross images

Images hosted on PathOut server:
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Blue discoloration of endocardium (arrowhead) just above coronary sinus (CS) and posterior to rim of fossa ovalis (FO)

Microscopic (histologic) description
  • Unilocular, blood filled cyst lined by endothelial cells and filled with organizing thrombus
Microscopic (histologic) images

Images hosted on PathOut server:
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Dilated vein with focal attenuation of wall

Differential diagnosis
  • Blood cyst: congenital, along lines of closure of heart valves