Which clinical staging of Wilm's tumor involves metastasis to distant organs?

Appeared in: DSSSB -28 August 2019 (Shift-2)

Explanation

Stage IV Wilms tumor is specifically defined by the presence of distant metastases, meaning the cancer has spread far from the original tumor site.
This spread occurs hematogenously (through the bloodstream).
The most common sites for distant metastasis in Wilms tumor are the lungs, followed by the liver, bone, and brain.
Diagnosis of Stage IV requires imaging of distant sites, such as a chest CT scan, to detect these metastases.

Option A: Stage III involves tumor that remains within the abdomen after surgery. This includes positive regional lymph nodes, tumor spillage, or peritoneal implants, but not spread to distant organs outside the abdomen.
Option C: Stage II describes a tumor that has grown beyond the kidney but has been completely resected (surgically removed) with no evidence of spread to lymph nodes or distant sites.
Option D: Stage V is a unique classification used specifically when both kidneys are involved with tumors at the time of initial diagnosis (bilateral disease). It does not describe distant metastasis.

Clinical Relevance

Nursing practice connection: Knowing Staging of Wilms' Tumor helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
The single most important nursing intervention for a child with a suspected Wilms tumor is to avoid palpating the abdomen. A sign stating 'DO NOT PALPATE ABDOMEN' should be placed over the child's bed to prevent accidental rupture of the tumor.
Nurses should monitor blood pressure closely, as hypertension is common (in about 25% of cases) due to the tumor's production of renin.
Assessment for hematuria (blood in urine) and a non-tender, firm abdominal mass that typically does not cross the midline are key diagnostic clues.

How to Approach the Question

First, identify the core concept of the question, which is cancer staging, specifically for Wilms tumor.
The keyword is 'metastasis to distant organs'. This points to an advanced stage of cancer.
Recall the definitions for each stage of Wilms tumor. It's helpful to remember that staging generally progresses from localized (I, II), to regional spread/residual disease (III), to distant spread (IV).
Evaluate each option against the definition of distant metastasis.
Stage I and II are localized. Stage III is residual abdominal disease. Stage V is bilateral disease. Stage IV is defined by distant metastasis.
Therefore, select the option corresponding to Stage IV.

Concept Tested & Keywords

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E6 Nelson Textbook of Pediatrics(2024) — Volume 2 p. 937-939

E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 637-639

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