membranous glomerulonephritis

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glomerulonephritis

 [glo-mer″u-lo-nĕ-fri´tis]
a variety of nephritis characterized by inflammation of the capillary loops in the glomeruli of the kidney. It occurs in acute, subacute, and chronic forms and may be secondary to an infection, especially with the hemolytic streptococcus.
Histologic appearance of acute glomerulonephritis. A, Normal glomerulus. B, Glomerulonephritis. The glomerulus appears hypercellular and the capillaries are narrowed or occluded. From Damjanov, 2000.
diffuse glomerulonephritis a severe form of glomerulonephritis with proliferative changes in more than half the glomeruli, frequently with epithelial crescent formation and necrosis; it is often seen in cases of advanced systemic lupus erythematosus.
IgA glomerulonephritis IgA nephropathy.
lobular glomerulonephritis (membranoproliferative glomerulonephritis) a chronic glomerulonephritis characterized by mesangial cell proliferation and irregular thickening of the glomerular capillary wall. There are two subtypes: Type I is marked by subendothelial deposits and activation of the classic complement pathway. Type II is marked by heavy deposits in the glomerular basement membrane and activation of the alternative complement pathway. Both types occur in older children and young adults and follow a slowly progressing course with irregular remissions ultimately resulting in renal failure.
membranous glomerulonephritis a form characterized by proteinaceous deposits on the glomerular capillary basement membrane or by thickening of the membrane, with circulating antigen-antibody complexes indicating immune complex disease; it may be secondary to any of numerous other conditions. In some cases it may develop into the nephrotic syndrome. Called also membranous nephropathy.
mesangiocapillary glomerulonephritis membranoproliferative glomerulonephritis.
rapidly progressive glomerulonephritis acute glomerulonephritis marked by a rapid progression to end-stage renal disease and histologically by profuse epithelial proliferation, often with epithelial crescents; principal signs are anuria, proteinuria, hematuria, and anemia. Plasmapheresis or high doses of corticosteroids may lead to recovery of renal function.

mem·bra·nous glo·mer·u·lo·ne·phri·tis

glomerulonephritis characterized by diffuse thickening of glomerular capillary basement membranes, due in part to subepithelial deposits of immunoglobulins separated by spikes of basement membrane material, and clinically by an insidious onset of the nephrotic syndrome and failure of disappearance of proteinuria; the disease is most commonly idiopathic but may be secondary to malignant tumors, drugs, infections, or systemic lupus erythematosus.

membranous glomerulonephritis

Nephrology A common idiopathic nephropathy usually affecting those > age 40, caused by immune complex deposition in the capillary wall of the glomerular basement membrane; it is the most common cause of nephrotic syndrome Clinical Asymptomatic proteinuria or nephrotic syndrome; possibly, edema, weight gain, hypertension, nocturia, anorexia, GFR is near normal Urinalysis Oval fat bodies, hyaline, granular, fatty casts Risk factors HBV, malaria, malignant solid tumors, NHL, SLE, syphilis, etc, drug or substance exposure–gold, mercury, penicillamine, trimethadione, skin-lightening creams Treatment Glucocorticoids and/or immunsuppressants may be used in some Pts. See Glomerulonephritis.

mem·bra·nous glo·mer·u·lo·ne·phri·tis

(mem'bră-nŭs glō-mer'yū-lō-nĕ-frī'tis)
Glomerulonephritis characterized by diffuse thickening of glomerular capillary basement membranes, due in part to subepithelial deposits of immunoglobulins separated by spikes of basement membrane material, and clinically by an insidious onset of the nephrotic syndrome and failure or disappearance of proteinuria; the disease is most commonly idiopathic but may be secondary to malignant tumors, drugs, infections, or systemic lupus erythematosus.

glomerulonephritis

a variety of nephritis characterized by inflammation of the capillary loops in the glomeruli of the kidney with secondary tubulointerstitial and vascular changes. It occurs in acute, subacute and chronic forms and may be secondary to infection or immune mechanisms.

immune-mediated glomerulonephritis
caused by deposition of immune complexes on the glomerular basement membrane or autoantibodies against the glomerular basement membrane.
lobular glomerulonephritis
a form in which all glomeruli are affected, with accentuation of the lobulation of the glomerular tufts; it is marked by constant proteinuria and microscopic hematuria.
membranoproliferative glomerulonephritis, mesangiocapillary glomerulonephritis
a chronic, slowly progressive glomerulonephritis in which the glomeruli are enlarged as a result of proliferation of mesangial cells and irregular thickening of the capillary walls, which narrows the capillary lumina; the onset is sudden, with hematuria, proteinuria or nephrotic syndrome and a persistent reduction in serum complement levels and deposition of activated complement components in the glomerular capillaries. Occurs in Finnish-Landrace sheep and is the most common glomerulopathy seen in dogs.
membranous glomerulonephritis
diffuse and irregular thickening of the basement membrane where there is diffuse granular deposition of immunoglobulin and complement. The most common type of glomerular disease in cats.
mesangioproliferative glomerulonephritis
see membranoproliferative glomerulonephritis (above).
proliferative glomerulonephritis
glomerular changes are principally those of cellular proliferation.

membranous

pertaining to or emanating from a membrane.

membranous glomerulonephritis
see membranous glomerulonephritis.
membranous pneumocyte
see alveolar epithelial cells (type 1).