NCLEX Review Guide: Nephroblastoma (Wilms' Tumor)

Key Characteristics

• Nephroblastoma (Wilms' tumor) is the most common primary kidney malignancy in children, typically occurring between ages 2-5 years. This embryonal tumor arises from primitive kidney cells and presents as a unilateral abdominal mass in 90% of cases.
• The tumor develops from metanephric blastema - primitive kidney tissue that fails to differentiate properly during fetal development. Risk factors include genetic syndromes like WAGR syndrome and Beckwith-Wiedemann syndrome.

Assessment Findings

• The classic triad includes: palpable abdominal mass (most common), abdominal pain, and hematuria. However, only 10% of patients present with all three symptoms simultaneously.
• Additional signs may include hypertension (due to renin production), fever, anemia, and weight loss. The abdominal mass is typically smooth, firm, and non-tender on palpation.

Diagnostic Tests

• CT scan with contrast is the gold standard for diagnosis and staging, providing detailed images of tumor size, location, and potential metastases. Ultrasound may be used initially to differentiate solid from cystic masses.
• Laboratory studies include CBC (anemia assessment), urinalysis (hematuria), and liver function tests. Chest X-ray or CT is essential to rule out pulmonary metastases.

Treatment Protocol

1. Surgical resection (nephrectomy) is the primary treatment, typically performed after initial chemotherapy to reduce tumor size
2. Chemotherapy regimens include vincristine, actinomycin D, and doxorubicin based on staging and histology
3. Radiation therapy may be indicated for advanced stages or unfavorable histology
4. Treatment follows protocols from Children's Oncology Group (COG) with excellent prognosis (>90% survival)

Nursing Interventions

• Place "DO NOT PALPATE ABDOMEN" sign at bedside to prevent tumor rupture and potential metastatic seeding. Gentle care during positioning and bathing is essential.
• Monitor for complications including hypertension, infection, and chemotherapy side effects. Provide family education about treatment plan and supportive care measures.

NCLEX Success Strategies

• Remember the "no palpation" rule - this is a frequent NCLEX question about appropriate nursing actions
• Focus on age ranges: Wilms' tumor peaks at 2-5 years, making it distinct from other childhood cancers
• Understand the excellent prognosis with treatment - this helps with family education questions

Self-Assessment Checklist

• ☐ I can identify the peak age range for Wilms' tumor
• ☐ I understand why excessive palpation should be avoided
• ☐ I can differentiate Wilms' tumor from neuroblastoma
• ☐ I know the typical treatment sequence
• ☐ I can identify key nursing interventions