All are non-proliferative GN except –
**Core Concept**
Non-proliferative glomerulonephritis (GN) refers to a type of kidney disease characterized by the inflammation of glomeruli without significant cell proliferation. This category of GN is typically associated with immune complex deposition and complement activation, leading to glomerular damage.
**Why the Correct Answer is Right**
Non-proliferative GN involves the deposition of immune complexes, such as in membranous nephropathy, where subepithelial deposits are formed due to the binding of circulating antibodies to antigens on the epithelial side of the glomerular basement membrane. The activation of the complement system and the subsequent inflammatory response contribute to the glomerular damage.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided, so we cannot evaluate its correctness. However, we will proceed with the other options.
**Option B:** This option might refer to a proliferative GN, such as focal segmental glomerulosclerosis (FSGS), where there is significant cell proliferation and scarring. FSGS is characterized by the collapse of glomerular capillaries and the replacement of normal glomerular tissue with sclerotic material.
**Option C:** This option might refer to a proliferative GN, such as membranoproliferative glomerulonephritis (MPGN), where there is increased cellularity and mesangial proliferation. MPGN is characterized by the deposition of immune complexes and complement activation, leading to the thickening of the glomerular basement membrane.
**Clinical Pearl / High-Yield Fact**
It's essential to differentiate between non-proliferative and proliferative GN, as the prognosis and treatment of these conditions differ. Non-proliferative GN is often associated with a better prognosis and may respond to immunosuppressive therapy, whereas proliferative GN may require more aggressive treatment and has a poorer prognosis.
**Correct Answer:** (Please provide the correct answer options to complete the explanation)