pannus


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Related to pannus: corneal pannus, abdominal pannus

pannus

 [pan´us]
1. superficial vascularization of the cornea with infiltration of granulation tissue.
2. an inflammatory exudate overlying synovial cells on the inside of a joint capsule, usually occurring in rheumatoid arthritis or related articular rheumatism.
3. panniculus adiposus.
Schematic presentation of the pathologic changes in rheumatoid arthritis. The inflammation (synovitis) leads to pannus formation, obliteration of the articular space. From Damjanov, 2000.

pan·nus

, pl.

pan·ni

(pan'ŭs, pan'ī), A membrane of granulation tissue covering a normal surface:
1. The inflammatory synovial tissue found in rheumatoid joints that covers the articular cartilages that progressively destroys the underlying articular cartilages; also found in other chronic granulomatous disease, including tuberculosis.
See also: corneal pannus.
2. The cornea in trachoma.
See also: corneal pannus.
[L. cloth]

pannus

/pan·nus/ (pan´us) [L.]
1. superficial vascularization of the cornea with infiltration of granulation tissue.
2. an inflammatory exudate overlying the synovial cells on the inside of a joint.

pannus trachomato´sus  pannus of the cornea secondary to trachoma.

pannus

[pan′əs]
Etymology: L, cloth
an abnormal condition of the cornea, which becomes vascularized and infiltrated with granular tissue just beneath the surface. Pannus may develop in the inflammatory stage of trachoma or after a detached retina, glaucoma, iridocyclitis, or other degenerative eye disorder.

pannus

A reticulated membrane of granulation (reactive fibrovascular) tissue, which is typical of the chronic proliferodestructive phase of rheumatoid arthritis; immune complexes form at synovial membranes, evoking a nonspecific immune response by macrophages, resulting in global destruction of chondroosseous tissue.

pannus

Rheumatology A reticulated membrane of granulation–reactive fibrovascular tissue typical of the chronic proliferodestructive phase of rheumatoid arthritis; immune complexes form at synovial membranes, evoking a nonspecific response, resulting in global destruction of chondroosseous tissue

pan·nus

, pl. panni (pan'ŭs, -ī)
1. A membrane of granulation tissue covering a normal surface.
2. The articular cartilages in rheumatoid arthritis and in chronic granulomatous diseases such as tuberculosis.
3. The cornea in trachoma.
See also: corneal pannus
[L. cloth]

pannus

A membrane of fine blood vessels and fibrous tissue that spreads down over the cornea in TRACHOMA and other inflammatory corneal disorders causing loss of vision. A similar membrane can affect the inner linings of joints.

pannus

chronic inflammatory hyperplasia of synovial membrane of joints affected by rheumatoid arthritis; characterized by granulation tissue (infiltrated by inflammatory cells and releasing lytic enzymes) that intrudes into the affected joint space, eroding bone margins and articular cartilage

pannus 

Abnormal superficial vascularization of the cornea covering the upper half, or sometimes the entire cornea. It is characterized by a thick plexus of vessels. It is found in some cases of contact lens wear, mainly soft lenses. Pannus following contact lens wear is referred to as corneal vascularization. If induced by soft lenses, it can be reduced by changing to lenses of high oxygen transmissibility or ceasing contact lens wear. Deep corneal vascularization involving the stroma is usually the result of a disease process (e.g. interstitial keratitis, phlyctenular keratitis, severe long-standing trichiasis, trachoma).

pannus

1. superficial vascularization of the cornea with infiltration of granulation tissue.
2. an inflammatory exudate overlying synovial cells on the inside of a joint capsule, usually occurring in rheumatoid arthritis or related articular rheumatism.
3. panniculus adiposus.

degenerative pannus
see chronic superficial keratitis.
References in periodicals archive ?
There was an extremely large abdominal pannus and a secondary suprapubic pannus, which extended to his knees (Fig.
13) In this system, pannus covering part of the circumference of the valve sewing ring was classified as mild.
For example, in rheumatoid arthritis (RA) distinct disease mediators (mechanisms) contribute towards various aspects of the disease such as inflammation, angiogenesis, pannus formation (thickened layers of granulation tissue) and bone and cartilage erosion.
1) It is characterized by synovial inflammation and subsequent pannus formation causing cartilage destruction and bone erosion, severe disability and increased mortality.
Doggles are sunglasses designed especially for dogs and are particularly good for those canine friends which have eye disorders like pannus and light sensitivity.
Daily, oral dosing of AVL-292 is efficacious in a therapeutic model of Collagen Induced Arthritis ("CIA") in mice, significantly reducing not only clinical arthritis scores but also inflammation, pannus formation in the joint, and damage to cartilage and bone.
The treatment goals for this disease are long-term relief of pain, prevention of joint inflammation and suppression of pannus formation and morphological changes (Li et al.
All Doggles boast rugged poly-carbonate (shatterproof) anti-fog lenses with 100 per cent UV protection, and are great for dogs with eye disorders such as pannus and light sensitivity.
Rheumatoid arthritis can also have an appearance similar to that of synovial metastasis, as the pannus or hypertrophic synovium can appear T1 hypointense and T2 hyperintense.
Encountered complications with caged ball valve such as; systemic embolisation, ball variance, high pressure gradient, growth of pannus and chronic hemolysis; lead to new valve designs (2-5).
The enzymes produced by the pannus cause cartilage breakdown.