What condition is represented by electron microscopy showing irregular thickening of glomerular basement membrane ("basket weave")?

What condition is represented by electron microscopy showing irregular thickening of glomerular basement membrane ("basket weave")?

• A. Alport syndrome
• B. Diabetic nephropathy
• C. Minimal change disease
• D. Focal segmental glomerulosclerosis

Answer: (A)

The condition characterized by electron microscopy revealing irregular thickening of the glomerular basement membrane, often described as having a "basket weave" appearance, is Alport syndrome. This genetic disorder primarily impacts the collagen structure within the glomerular basement membrane, leading to the noted structural abnormalities. Alport syndrome is caused by mutations in the genes responsible for type IV collagen, which is an integral part of the glomerular basement membrane. As a result, the basement membrane becomes structurally compromised, leading to the characteristic basket weave pattern observed under electron microscopy. In contrast, diabetic nephropathy, while associated with changes in the structure of the glomerulus, typically shows a different pattern of changes, such as diffuse thickening of the basement membrane but not the "basket weave" appearance indicative of Alport syndrome. Minimal change disease is typically characterized by effacement of podocyte foot processes rather than basement membrane thickening. Lastly, focal segmental glomerulosclerosis is associated with segmental sclerosis of glomeruli but does not exhibit the distinctive basket weave appearance of the basement membrane as seen in Alport syndrome. Therefore, the features of electron microscopy pointing to irregular thickening of the glomerular basement membrane with a basket weave appearance uniquely correlate with

The condition characterized by electron microscopy revealing irregular thickening of the glomerular basement membrane, often described as having a "basket weave" appearance, is Alport syndrome. This genetic disorder primarily impacts the collagen structure within the glomerular basement membrane, leading to the noted structural abnormalities.

Alport syndrome is caused by mutations in the genes responsible for type IV collagen, which is an integral part of the glomerular basement membrane. As a result, the basement membrane becomes structurally compromised, leading to the characteristic basket weave pattern observed under electron microscopy.

In contrast, diabetic nephropathy, while associated with changes in the structure of the glomerulus, typically shows a different pattern of changes, such as diffuse thickening of the basement membrane but not the "basket weave" appearance indicative of Alport syndrome. Minimal change disease is typically characterized by effacement of podocyte foot processes rather than basement membrane thickening. Lastly, focal segmental glomerulosclerosis is associated with segmental sclerosis of glomeruli but does not exhibit the distinctive basket weave appearance of the basement membrane as seen in Alport syndrome.

Therefore, the features of electron microscopy pointing to irregular thickening of the glomerular basement membrane with a basket weave appearance uniquely correlate with