Perianal
Located around the anus, the opening of the rectum to the outside of the body.
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- Perianal abscess
A local accumulation of pus that forms next to the anus, causing tender swelling in that area and pain on defecation.
- Periaortic
Around the aorta. For example, periaortic lymph nodes are lymph nodes around the aorta.
- Periappendiceal
Near the appendix. Perforation of the appendix can lead to a periappendiceal abscess (a collection of pus near the appendix).
- Pericardial
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.