The renal tumour which has multicentric origin –
**Core Concept**
Renal tumors can be classified based on their origin, and multicentric origin refers to tumors that arise from multiple sites within the kidney. This is in contrast to unifocal tumors, which originate from a single site.
**Why the Correct Answer is Right**
Wilms tumor is a type of renal cancer that is most common in children, and it is known to have a multicentric origin. This means that Wilms tumor can arise from multiple sites within the kidney, making it distinct from other types of renal tumors that have a unifocal origin. The multicentric origin of Wilms tumor is thought to be due to the presence of embryonal cells in the kidney that have the potential to give rise to tumors.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Angiomyolipoma is a type of renal tumor that is typically benign and has a unifocal origin. It arises from the renal parenchyma and is characterized by the presence of blood vessels, smooth muscle cells, and fat cells.
**Option B:** This option is incorrect because Renal cell carcinoma is a type of renal tumor that is typically malignant and has a unifocal origin. It arises from the renal epithelium and is characterized by the presence of clear cells, which are filled with lipids.
**Option C:** This option is incorrect because Metanephric adenoma is a type of renal tumor that is typically benign and has a unifocal origin. It arises from the renal parenchyma and is characterized by the presence of tubular structures and a low cellularity.
**Clinical Pearl / High-Yield Fact**
Wilms tumor is the most common type of renal cancer in children, and it is often associated with a favorable prognosis if detected early. The multicentric origin of Wilms tumor makes it distinct from other types of renal tumors and is an important consideration in the diagnosis and treatment of this condition.
**Correct Answer: D. Wilms tumor**