Wilms Tumor Differential Diagnoses
- Author: Arnold C Paulino, MD; Chief Editor: Robert J Arceci, MD, PhD more...
Diagnostic Considerations
Conditions to be considered in the differential diagnosis of Wilms tumor include the following:
- Mesoblastic nephroma - Most common renal tumor in the first month of life[19]
- Renal cell carcinoma
- Clear cell sarcoma of the kidney
- Rhabdoid tumor of the kidney
- Nonmalignant mass
- Hydronephrosis
- Multicystic kidney disease
- Renal cyst
- Renal thrombosis
- Dysplastic kidney
- Renal hemorrhage
Differential Diagnoses
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| Stage | Relapse-Free Survival, % | Overall Survival, % |
| I | 92 | 98 |
| II | 85 | 96 |
| III | 90 | 95 |
| IV | 80 | 90 |
| Stage and Histology | Surgery | Chemotherapy | Radiation Therapy* |
| Stage I or II favorable histology without loss of heterozygosity (LOH) 1p and 16q† | Nephrectomy | Vincristine, dactinomycin | No |
| Stage I or II favorable histology with LOH 1p and 16q | Nephrectomy | Vincristine, dactinomycin, doxorubicin | No |
| Stage III and IV favorable histology without LOH 1p and 16q | Nephrectomy | Vincristine, dactinomycin, doxorubicin | Yes |
| Stage III and IV favorable histology with LOH 1p and 16q | Nephrectomy | Vincristine, dactinomycin, doxorubicin, cyclophosphamide, etoposide | Yes |
| * The current dose for radiation therapy for favorable histology Wilms tumor is approximately 1080 cGy for the abdomen and 1200 cGy for the lung.[24] Postoperative radiotherapy is started within 14 days of nephrectomy.[25] Patients with stage IV favorable histology Wilms tumor and lung metastases whose pulmonary lesions do not disappear after 6 weeks of chemotherapy receive whole-lung radiation therapy. † Some evidence suggests that certain children with stage I disease and favorable histology do well with nephrectomy alone.[26] Children younger than 24 months with small (< 550 g) Wilms tumors with favorable histology are noted in the current COG protocol. | |||
| Stage and Type of Wilms Tumor | Imaging Studies | Off-Treatment Schedule |
| Stages I, II, and III with favorable histology; stages I, II, and III with anaplastic histology | Chest radiography | 6 wk and 3 mo after surgery, then every 3 mo (5 times), then every 6 mo (3 times), then yearly (2 times) |
| All stages in patients aged < 48 mo at diagnosis with nephrogenic rests | Abdominal ultrasonography | Every 3 mo for 6 y |
| All stages in patients aged >48 mo at diagnosis with nephrogenic rests | Abdominal ultrasonography | Every 3 mo for 4 y |
| Stages I and II with favorable histology | Abdominal ultrasonography | Yearly (6 times) |
| Stage III with favorable histology | Abdominal ultrasonography | 6 wk and 3 mo after surgery, then every 3 mo (5 times), then every 6 mo (3 times), then yearly (2 times) |
| All stages with unfavorable histology | Abdominal ultrasonography | Every 3 mo (4 times), then every 6 mo (4 times) |
| * Subsequent imaging studies should be performed as clinically indicated. | ||

