Perianal abscess

A local accumulation of pus that forms next to the anus, causing tender swelling in that area and pain on defecation.

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  • 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.

  • 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 […]

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