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Lines of Zahn

Tissue damage caused by thrombosis

Field	Value
name	Lines of Zahn
image	Pulmonary thromboembolus, recent (3626658803).jpg
caption	A recent pulmonary thrombo-embolus with prominent lines of Zahn. The pale areas consist of fibrin and platelets. The red areas consist of erythrocytes.
specialty	Pathology
causes	Thrombosis

Lines of Zahn are a characteristic of thrombi. They have layers, with lighter layers of platelets and fibrin, and darker layers of red blood cells. They are more present on thrombi formed with faster blood flow, more so on thrombi from the heart and aorta. They are only seen on thrombi formed before death. They are named after German–Swiss pathologist Friedrich Wilhelm Zahn.

Definition

Lines of Zahn are a characteristic of thrombi. They have visible and microscopic alternating layers (laminations). Platelets mixed with fibrin form lighter layers. Red blood cells form darker layers. Sometimes, the term "lines of Zahn" only refers to the lighter layers.

Evaluation

Lines of Zahn can be used to confirm diagnosis of a thrombus. Their presence implies thrombosis at a site of rapid blood flow that happened before death. They are more common in thrombi formed in the heart or aorta. In veins or smaller arteries, where flow is not as constant, they occur less frequently. They are also only seen on thrombi formed when blood is flowing. This is a distinguishing marker between thrombi that formed before death and after death.

History

Lines of Zahn are named after German–Swiss pathologist Friedrich Wilhelm Zahn.

Additional images

File:Histopathology showing lines of Zahn in a thrombus.jpg|Thrombus showing circumferential lines of Zahn. File:Laminations in a thrombus - low mag.jpg|Low magnification micrograph showing laminations in a thrombus in a fatal pulmonary embolism. H&E stain. File:Laminations in a thrombus - intermed mag.jpg|Intermediate magnification micrograph showing laminations in a thrombus in a fatal pulmonary embolism. H&E stain. File:Laminations in a thrombus - high mag.jpg|High magnification micrograph showing laminations in a thrombus in a fatal pulmonary embolism. H&E stain.

References

(1971). "Thrombosis and Bleeding Disorders - Theory and Methods". [[Academic Press]].
(May 2012). "Lines of Zahn in coronary artery thrombus". European Heart Journal.
(March 2011). "Leukocytes and the natural history of deep vein thrombosis: current concepts and future directions". Arteriosclerosis, Thrombosis, and Vascular Biology.
(December 2017). "Deep vein thrombosis: pathogenesis, diagnosis, and medical management". Cardiovascular Diagnosis and Therapy.
(January 2020). "Pathophysiologic and Therapeutic Perspectives Based on Thrombus Histology in Stroke". Journal of Stroke.
(2006). "Stedman's Medical Dictionary". Lippincott, Williams, & Wilkins.

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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