Background: Congenital pouch colon (CPC), a high type of anorectal malformation, is a sporadic disease and several environmental factors are known to be involved in its pathology. To the best of our knowledge, no familial incidence of CPC has been reported anywhere in the literature so far.
Aim: In the present study, which is first of its kind, we have reported the familial incidences of CPC and also tried to elucidate the role of genetics in this pathology.
Methods: We have reported 1 familial pedigree of CPC and 2 incidences of dizygotic twins (DZ), out of them one is affected and another one is normal. Highly comprehensive microarray CytoScan HD from Affymetrix was employed to understand the defects underlying submicroscopic genomic imbalance like segment duplication and deletion of the twin patients vis-à-vis their parents and unaffected siblings in these DZ twins.
Results: A total of 21 copy number variations (CNVs) were reported in the patient samples that did not overlap with the CNVs in normal parents and healthy sibling, including 5 loss, 3 LOH and 13 gain with size varied from 95 bp to 77 kbp. Genetic analysis revealed involvement of 12 potential genetic loci on Chr 1, 2, 3, 4, 6, 11, and 16.
Conclusion: Genetic study found that CPC could be a developmental disorder. These findings are important for further elucidating genetic causes of CPC pathogenesis.
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