Question

the renal tumor seen most commonly in childhood, that produces a large, grayish white, encapsulated mass and is comparatively sensitive to both radiotherapy and chemotherapy.

angiomyolipoma
grawitzs tumor
nephroblastoma
renal cell carcinoma
transitional cell carcinoma

Explanation:

To solve this, we analyze each option:

• Angiomyolipoma: Rare, not childhood - typical renal tumor.
• Grawitz's tumor: Another name for renal cell carcinoma, which is adult - onset.
• Nephroblastoma (Wilms' tumor): Most common childhood renal tumor, forms large encapsulated mass, responsive to chemo/radiotherapy.
• Renal cell carcinoma: Adult - predominant, not childhood - typical.
• Transitional cell carcinoma: Affects urothelium, not typical renal parenchymal tumor of childhood.

Answer:

C. Nephroblastoma