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Bilateral cystic nephroblastomas and multiple malformations with trisomy 8 mosaicism
Insights
This report details a rare genetic disorder in siblings involving cystic nephroblastomas and developmental abnormalities. Trisomy 8 mosaicism was identified, suggesting a familial syndrome with genetic causes.
Area of Science:
- Pediatric Genetics
- Developmental Biology
- Oncology
Background:
- Familial occurrence of rare genetic disorders can provide insights into underlying mechanisms.
- Syndromic presentations involving multiple congenital anomalies require thorough genetic investigation.
- Nephroblastomas, a form of Wilms tumor, can occur in syndromic contexts.
Observation:
- A 16-month-old female infant presented with bilateral cystic nephroblastomas, Dandy-Walker syndrome, microcephaly, bilateral cataracts, and cerebellar heterotopia.
- The patient's elder sister had a history of bilateral cystic nephroblastomas, genitourinary sarcoma, microcephaly, arhinencephaly, and bilateral cataracts.
- Chromosomal analysis revealed trisomy 8 mosaicism in the infant.
Findings:
- The co-occurrence of multiple congenital anomalies and tumors in siblings points towards a potential genetic syndrome.
- Trisomy 8 mosaicism, a chromosomal abnormality, was confirmed in the affected infant.
- The familial pattern suggests a hereditary component to the observed abnormalities.
Implications:
- This case highlights the importance of genetic evaluation in infants with complex congenital anomalies and tumors.
- Identifying trisomy 8 mosaicism in this context may aid in understanding the pathogenesis of this rare syndrome.
- Further research into familial cancer syndromes with developmental defects is warranted.
Abstract:
The case of a 16-month-old female infant with bilateral cystic nephroblastomas, Dandy-Walker syndrome, microcephaly, bilateral cataracts, and cerebellar heterotopia is reported. The patient's older sister, who had had bilateral cystic nephroblastomas, botryoid sarcoma involving the vagina and urinary bladder, microcephaly, arhinencephaly, and bilateral cataracts, was described in a previous report. Chromosomal study in the present case confirmed trisomy 8 mosaicism (rate of mosaicism, 16 per cent). The familial occurrence and the chromosomal disorder suggest a syndrome involving genetic abnormalities.