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Vet Surg. 2011 Aug;40(6):762-7. doi: 10.1111/j.1532-950X.2011.00860.x. Epub 2011 Jul 19.

Comparison of computed tomographic and radiographic popliteal lymphangiography in normal dogs.

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  • 1Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada.



To (1) describe computed tomographic (CT) popliteal lymphangiography; (2) compare the number of thoracic duct (TD) branches detected by CT and by radiography after popliteal lymphangiography; and (3) to compare the number of branches detected after left and right popliteal lymphangiography.


Experimental study.


Adult dogs (n=6).


A randomly selected popliteal lymph node was percutaneously injected with 12 L iodinated contrast medium through a 25-g butterfly catheter over 4-5 minutes. Lateral and ventrodorsal (VD) thoracic radiograph projections and thoracic CT were performed. The procedure was repeated using the contralateral lymph node after a 48-72 hours washout period.


One dog had TD branches visible on CT but not on radiographs. A significantly greater number of TD branches were observed with CT popliteal lymphangiography compared with lateral and VD radiographic popliteal lymphangiography (P=.003 and P<.001, respectively). The number of visible TD branches observed between the 6th thoracic and 1st lumbar vertebrae were not significantly different in these dogs (P=.146). A significant difference in number of TD branches observed was not found after left or right popliteal lymph node injection (P=.097).


CT popliteal lymphangiography consistently identified a greater number of TD branches when compared with radiographic popliteal lymphangiography. Injection of either popliteal lymph node resulted in the same number of TD branches being observed.

© Copyright 2011 by The American College of Veterinary Surgeons.

[PubMed - indexed for MEDLINE]
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