Focal segmental glomerulosclerosis
Primary FSGS is itself a heterogeneous disease, likely with multiple pathogenic mechanisms resulting in a similar histologic pattern of injury. Secondary causes include chronic reflux nephropathy, chronic hypertension, and obesity.
Clinical presentations vary widely, but typically individuals with primary FSGS present with the nephrotic syndrome. Secondary FSGS is typically associated with less severe proteinuria, often without hypoalbuminemia or peripheral edema.
For more information, see OMIM.
N26.9 – Renal sclerosis, unspecified
236403004 – Focal Segmental Glomerulosclerosis
- Minimal-change disease – sometimes can be very difficult to distinguish from early FSGS, but if Ki67 stain is completed and is positive, this is specific for FSGS
- Membranous nephropathy
- Diabetic glomerulosclerosis (see diabetic nephropathy)
- Lupus nephritis Class V (see systemic lupus erythematosus)
- Renal amyloidosis (AL amyloidosis, AA amyloidosis)
- Light-chain deposition disease
- IgA nephropathy (less common presentation)
- Membranoproliferative glomerulonephritis (less common presentation)
- Fibrillary glomerulonephritis (rare)
- Immunotactoid glomerulonephritis (rare)
- Fabry disease (rare presentation of a rare disease)