periapical tissue |
Tissue surrounding the apex of a tooth, including the apical portion of the periodontal membrane and alveolar bone. (12 Dec 1998) |
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periappendiceal abscess |
An intraperitoneal abscess, usually in the right iliac fossa, resulting from extension of infection in acute appendicitis, especially with perforation of the appendix. Synonym: periappendiceal abscess. (05 Mar 2000) |
periappendicitis |
Inflammation of the tissue surrounding the vermiform appendix. Synonym: para-appendicitis. Periappendicitis decidualis, the presence of decidual cells in the peritoneum of the vermiform appendix in cases of right tubal pregnancy with adhesions between the fallopian tube and the appendix. (05 Mar 2000) |
periappendicular |
Surrounding an appendix, especially the vermiform appendix. (05 Mar 2000) |
periapt |
A charm worn as a protection against disease or mischief; an amulet. "Now help, ye charming spells and periapts." (Shak) Origin: Gr, fr. Hung about, to hang about; about + to tie: cf. F. Periapte. Source: Websters Dictionary (01 Mar 1998) |
periaqueductal gray |
Central gray matter surrounding the cerebral aqueduct in the mesencephalon. Physiologically it is probably involved in rage reactions, the lordosis reflex, feeding responses, bladder tonus, and pain. (12 Dec 1998) |
periarterial |
Surrounding an artery. (05 Mar 2000) |
periarterial pad |
A collection of cells around the renal glomerular arterioles that contain cytoplasmic granules, probably composed of renin. Synonym: periarterial pad. (05 Mar 2000) |
periarterial plexus |
An autonomic plexus that accompanies an artery, surrounding it in a network of autonomic nerve fibres. Synonym: plexus periarterialis. (05 Mar 2000) |
periarterial plexus of maxillary artery |
<anatomy, artery> An autonomic plexus on the maxillary artery derived from the external carotid plexus. Synonym: internal maxillary plexus, maxillary plexus, plexus maxillaris internus. (05 Mar 2000) |
periarterial plexus of vertebral artery |
<anatomy, artery> A plexus of autonomic nerves on the vertebral artery derives from the subclavian plexus. Synonym: plexus vertebralis, vertebral plexus. (05 Mar 2000) |
periarterial sympathectomy |
Sympathetic denervation by arterial decortication. Synonym: histonectomy, Leriche's operation. (05 Mar 2000) |
periarteritis |
Inflammation of the adventitia of an artery. Synonym: exarteritis. (05 Mar 2000) |
periarteritis nodosa |
<radiology> Necrotizing vasculitis of medium-sized arteries, usually in male adults, associated with hepatitis B antigen, kidney: most frquently involved organ (85%), multiple small intrarenal aneurysms, aneurysms may disappear (thrombosis) or appear in new locations, arterial narrowing and thrombosis (chronic/healing stage), multiple small cortical infarcts, associated with hypertension and renal failure, chest involvement (70%), cardiomegaly/pericardial effusion (14%), wedge shaped/round peripheral infiltrates simulating PE (14%), interstitial lower lung field pneumonitis, also may involve liver (66%), mesenteric vessels (50%), skeletal muscle (39%), skin (20%) (12 Dec 1998) |
periarthric |
Surrounding a joint. Synonym: periarthric, periarticular. Origin: circum-+ L. Articulus, joint (05 Mar 2000) |