COMPASSIONATE ALLOWANCE INFORMATION
MALIGNANT RENAL RHABDOID TUMOR
Malignant Rhabdoid Tumor of the Kidney; Malignant RT
Malignant Renal Rhabdoid Tumor (MRRT) is a rare malignant tumor that can develop in many types of organs and tissues, but occurs primarily in the kidney or brain. It is a highly aggressive cancer mostly affecting children. MRRTs are caused by genetic mutations in chromosome 22 and mutations in the SMARCB1/INI1 gene.
DIAGNOSTIC TESTING, PHYSICAL FINDINGS, AND ICD-9-CM CODING
Diagnostic testing: Biopsy with histology reports; molecular genetic testing--usually chromosome microarray analysis or fluorescent in situ hybridization (FISH) test analysis documenting the 22q11.1 deletion; and imaging studies i.e. Chest CT, abdominal ultrasound; MR , CT or PET scan imagining of the brain and bone scan when evidence of metastases is warranted
Physical findings: People with MRRTs may present with signs and symptoms related to an intra-renal or large intra-abdominal mass. Children with this tumor may present with pain, high blood pressure, hematuria, fever, and synchronous or metachronous CNS lesions and metastases and secondary primary cancers.
ONSET AND PROGRESSION
MRRTs are very aggressive tumors that have a poor prognosis with mortality generally within 12 months of diagnosis. These tumors tend to occur in children under the age of two years.
Depending on the size and location of the tumor, treatment of MRRT generally consists of surgical tumor removal, and chemotherapy. Treatment of children with malignant rhabdoid tumors will require treatment planning by a multidisciplinary team consisting of pediatric oncologists, pediatric surgeon or urologist, radiation oncologist, pediatric geneticist, social worker, or nutritionist.
SUGGESTED PROGRAMMATIC ASSESSMENT*
Suggested MER for evaluation:
Clinical history and examination that describes the diagnostic features of the impairment and laboratory findings are needed to confirm the diagnosis.
Suggested Listings for Evaluation:
Inoperable, unresectable, metastatic, or recurrent disease in adults meets 13.21. Confirmed diagnosis of the original tumor or recurrence in children meets listing 113.03.
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* Adjudicators may, at their discretion, use the Medical Evidence of Record or Listings suggested to evaluate the claim. However, the decision to allow or deny the claim rests with the adjudicator.