| 释义 |
‖ pannus Path.|ˈpænəs|
[? L. pannus cloth; in F. panus (by Littré referred to L. pānus, Gr. πῆνος web).]
1. A vascular condition of the cornea of the eye, with thickening and opacity.
[c1400Lanfranc's Cirurg. 189 Pannus is a superfluite þat falliþ in a wommans face, & comeþ ofte in childberyng.] 1706Phillips, Pannus..a Disease of the Eye, when the Vessels that run to the corners swell with Blood, by reason of a stoppage or inflammation; so that a fleshy Web after⁓wards covers the whole Eye, or part of it. 1875H. Walton Dis. Eye 873 Such opacity with vascularity is called pannus.
2. Path. A layer of granulation tissue that forms by a thickening of the synovial membrane and tends to spread over and absorb adjacent cartilage in a joint affected by rheumatoid arthritis.
1904Boston Med. & Surg. Jrnl. 17 Nov. With the swelling which results the membrane at times extends in or over the cartilage, forming a pannus, and wherever this persists for any length of time.., the cartilage under the pannus is more or less absorbed. 1929R. Pemberton Arthritis & Rheumatoid Conditions iii. 53 The proliferation of the synovial membrane causes a layer of granulation tissue to extend in the form of a thin pannus more or less completely over the joint cartilage. 1973Nature 14 Dec. 419/1 The pannus of the rheumatoid joint has the ability to produce an active collagenase and invade and degrade cartilage in vitro. |