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The lymphatics of the canine parietal pericardium
M Eliskova1, O Eliska, A J Miller
1Anatomical Institute, Charles University, Prague, Czech Republic.
Insights
The parietal pericardium
Area of Science:
- Anatomy
- Lymphatic System
Background:
- The lymphatic drainage of the parietal pericardium is not well-understood.
- Previous studies using marker instillation may not accurately reflect in-vivo lymphatic pathways.
Purpose of the Study:
- To precisely map the lymphatic drainage pathways of the parietal pericardium.
- To compare anatomical findings with previous marker-instillation studies.
Main Methods:
- Detailed anatomical dissection of the parietal pericardium and associated lymphatic vessels.
- Histological examination of lymphatic pathways.
Main Results:
- A complex lymphatic network distinct from marker-instillation findings was identified.
- The pericardial cupola and posterior parietal pericardium drain to the right upper mediastinal cardiac lymph node.
- Anterior and lateral parietal pericardium lymphatics travel along phrenic nerves, draining to venous angles or diaphragmatic systems.
Conclusions:
- The lymphatic drainage of the parietal pericardium is intricate and follows specific anatomical routes.
- Anatomical study reveals a more complex and distinct lymphatic network than previously described.
Abstract:
A careful anatomical study of the lymphatic drainage from the parietal pericardium reveals a complicated network that is notably different from that defined by the instillation of markers into the pericardial sac. The pericardial cupola and the posterior (dorsal) area of the parietal pericardium drain directly to the cardiac lymph node in the right upper mediastinum by relatively short lymphatics. The lymphatics of the anterior and lateral areas of the parietal pericardium pass to collecting vessels that travel cranially or caudally along the phrenic nerves. The former traverse specific lymph nodes and then enter the right or left venous angles. The latter pass caudally and then drain to the major collecting systems from the area of the diaphragm.