Nitabuch’slayer is absent is
**Core Concept**
Nitabuch's layer is a type of basement membrane found in the glomerulus of the kidney, acting as a selective barrier for filtration. It is composed of a thin layer of compacted epithelial cells and a layer of mesangial cells.
**Why the Correct Answer is Right**
The absence of Nitabuch's layer is associated with conditions such as membranous nephropathy, where the thickening of the glomerular basement membrane leads to the destruction of the Nitabuch's layer. This results in the loss of the selective barrier function, allowing large molecules to pass through the glomerular filtration barrier. The loss of Nitabuch's layer also disrupts the normal functioning of the podocytes, leading to proteinuria and nephrotic syndrome.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incomplete and does not provide any relevant information.
**Option B:** This option is incorrect as it does not relate to the absence of Nitabuch's layer.
**Option C:** This option is incorrect as it is not a known association with the absence of Nitabuch's layer.
**Clinical Pearl / High-Yield Fact**
The absence of Nitabuch's layer is a key feature of membranous nephropathy, a common cause of nephrotic syndrome in adults. It is essential to recognize this histopathological feature to differentiate it from other glomerular diseases.
**Correct Answer:** D. Membranous nephropathy