Around the aorta. For example, periaortic lymph nodes are lymph nodes around the aorta.
Near the appendix. Perforation of the appendix can lead to a periappendiceal abscess (a collection of pus near the appendix).
Referring to the pericardium, the sac of fibrous tissue that surrounds the heart.
- Pericardial effusion
Too much fluid within the pericardium, which normally contains a small amount of serous, pale yellow fluid.
- Pericardial sac
A conical sac of fibrous tissue which surrounds the heart and the roots of the great blood vessels. Also called the pericardium. The pericardium has outer and inner coats. The outer coat is tough and thickened, loosely cloaks the heart, and is attached to the central part of the diaphragm and the back of the […]
- Pericardial tamponade
A life-threatening situation in which there is such a large amount of fluid (usually blood) inside the pericardial sac around the heart that it interferes with the performance of the heart. The end result, if untreated, is low blood pressure, shock and death. The excess fluid in the pericardial sac acts to compress and constrict […]