Rhabdoid tumor of the kidney is a component of the rhabdoid predisposition syndrome.
The rhabdoid predisposition syndrome (RPS) is characterized by pedigrees in which two or more individuals carry germline mutations of the hSNF5/INI1 tumor suppressor gene. The tumors associated with the syndrome include atypical teratoid/rhabdoid tumor (AT/RT), choroid plexus carcinoma, medulloblastoma, and extrarenal rhabdoid tumor. Rhabdoid tumor of the kidney (RTK) has not been described as part of the RPS. We report a case of a 7-month-old boy with RTK whose sister had a malignant cerebellar tumor followed by a malignant lung and pleural tumor of childhood with typical rhabdoid histology. Molecular genetic analysis of the RTK and tissue from the pleural tumor revealed in both cases identical nonsense mutations of the hSNF5/INI1 gene on chromosome 22q11.2, where thymidine was substituted for cytosine in base 472. The proband had an identical germline mutation. This is the fifth genetically analyzed RPS pedigree and the first to include an RTK.
Lee
Hwei-Yee
HY
Department of Pathology, KK Women's and Children's Hospital, 100 Bukit Timah Road, Singapore 229899, Singapore. hwei_yee@hotmail.com
Yoon
Chui-Shuen
CS
Sevenet
Nicolas
N
Rajalingam
Vasanthi
V
Delattre
Olivier
O
Walford
Norman Q
NQ
D002528:Cerebellar Neoplasms / Q000235:genetics / Q000473:pathology; D002868:Chromosomal Proteins, Non-Histone; D004268:DNA-Binding Proteins / Q000235:genetics; D005260:Female; D018095:Germ-Line Mutation / Q000235:genetics; D006801:Humans; D007150:Immunohistochemistry; D007223:Infant; D007680:Kidney Neoplasms / Q000235:genetics* / Q000378:metabolism / Q000473:pathology*; D008175:Lung Neoplasms / Q000556:secondary; D008297:Male; D010375:Pedigree; D010997:Pleural Neoplasms / Q000235:genetics / Q000556:secondary; D016133:Polymerase Chain Reaction; D018335:Rhabdoid Tumor / Q000235:genetics* / Q000378:metabolism / Q000473:pathology*; D000071796:SMARCB1 Protein; D014157:Transcription Factors
D002868:Chromosomal Proteins, Non-Histone; D004268:DNA-Binding Proteins; D000071796:SMARCB1 Protein; C513266:SMARCB1 protein, human; D014157:Transcription Factors