IgA nephropathy
![](/Images/godic/202502/08/Immunglobulin_A_as_Dimer2325.png")
![Immunostaining showing IgA in the glomerulus of a patient with Henoch-Schönlein nephritis.](/Images/godic/202502/08/Henoch-Schönlein_nephritis_IgA_immunostaining2326.jpg")
IgA nephropathy (IgAN), also known as IgA nephritis, Berger disease (/bɛərˈʒeɪ/) (and variations), or synpharyngitic glomerulonephritis, is a disease of the kidney (or nephropathy), specifically it is a form of glomerulonephritis or an inflammation of the glomeruli of the kidney.