Malignant Rhabdoid Tumor Clinical Presentation
- Author: James I Geller, MD; Chief Editor: Max J Coppes, MD, PhD, MBA more...
History
Children with rhabdoid tumor of the kidney (RTK) present with signs and symptoms related to an intrarenal mass.
- Pain is difficult to assess because the median age at presentation is about 11 months. However, fussiness is reported in most patients.
- Gross hematuria is a presenting feature in approximately 60% of patients. By contrast, only 20% of patients with Wilms tumor have gross hematuria.
- Fever is a presenting symptom in 50% of patients with a rhabdoid tumor of the kidney, compared with 25% of patients with a Wilms tumor.
- As many as 20% of patients with a rhabdoid tumor of the kidney have synchronous or metachronous CNS lesions, including both metastases and second primary cancers.
A detailed family cancer history should be obtained.
Physical
The physical findings of patients with malignant rhabdoid tumor (MRT) depend on the site of origin of the tumor.[10, 11]
- For rhabdoid tumor of the kidney, the physical examination is most remarkable for a large intra-abdominal mass.
- Hypertension, defined as blood pressure greater than the 95th percentile, is observed in up to 70% of patients.
- In contrast to a Wilms tumor, an malignant rhabdoid tumor is not associated with the WAGR syndrome, which consists of a Wilms tumor, aniridia, genitourinary anomalies, and mental retardation, or with Beckwith-Wiedemann syndrome, which is organomegaly, large birth weight, macroglossia, and hemihypertrophy.
- Evidence of focal neurologic signs or increased intracranial pressure should be evaluated in light of the prevalence of synchronous CNS tumors.
Causes
- Although mutations or deletions of the SMARCB1/INI1 gene play a role in the development of malignant rhabdoid tumor, the events that incite these genetic alterations are unknown.
- Several cases of familial malignant rhabdoid tumor are reported.
- No environmental or infectious associations with malignant rhabdoid tumor have been established.
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| Drug | Dosage | Route | Schedule |
| Carboplatin | Target dose to the AUC of 6 mg/mL/min by using the Calvert equation | IV | Day 1 |
| Etoposide | 3.3 mg/kg/dose or 100 mg/m2/dose | IV | Days 1, 2, and 3 |
| Ifosfamide | 65 mg/kg/dose or 2 g/m2/dose | IV | Days 1, 2, and 3 |
| Mesna | 16 mg/kg/dose or 500 mg/m2/dose | IV | Start immediately after and at 3 h, 6 h, and 9 h after ifosfamide |
| Filgrastim G-CSF | 5 mcg/kg/dose | SC | Start 24 h after chemotherapy and continue until ANC recovers |
| Drug | Dosage | Route | Schedule |
| Vincristine | 0.05 mg/kg/dose or 1.5 mg/m2/dose; not to exceed 2 mg/dose | IV | Days 1, 8, and 15 |
| Doxorubicin | 1.2 mg/kg/dose or 37.5 mg/m2/dose | IV | Days 1 and 2 |
| Cyclophosphamide | 60 mg/kg/dose or 1.8 g/m2/dose | IV | Day 1 |
| Mesna | 15 mg/kg/dose or 450 mg/m2/dose | IV | Start immediately after and at 3, 6, and 9 h after cyclophosphamide |
| Filgrastim G-CSF | 5 mcg/kg/dose | SC | Start 24 h after chemotherapy and continue until ANC recovers |

