Thickened glomerular basement membrane

What it means

Prominent glomerular basement membrane (GBM), reflecting an increase in thickness (subjective estimate) of the basal lamina of the glomerulus of the kidney.

This finding is demonstrated on renal biopsy.

Rare diseases that can present with this3

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Also called: Thickening of the glomerular basement membrane