Wilms' tumour (nephroblastoma) in children is staged by the COG (Children's Oncology Group) staging system. A Wilms' tumour involving both kidneys is classified as:
- A Stage III
- B Stage V ✓
- C Stage IV
- D Stage II with bilateral histology
Correct answer: B. Stage V
Explanation
In the COG staging for Wilms' tumour: Stage I = confined to kidney, complete excision; Stage II = extends beyond kidney, complete excision; Stage III = residual non-haematogenous tumour in abdomen; Stage IV = haematogenous metastases (lung, liver); Stage V = bilateral renal involvement at diagnosis. Stage V requires nephron-sparing surgery strategies to avoid bilateral nephrectomy.
Reference: Bailey & Love's Short Practice of Surgery, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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