We analyzed 14 families of Indian origin with Hemophilia A [sporadic and severe] for the presence of mosaic individuals by employing Allele Specific PCR, mutation enrichment experiment and sequencing.
Nine families had point mutations, 3 families had small deletions or insertions, 2 families had splice site mutations. The origin of the de novo mutation was assigned to the patients' mother in 8 families. For 4 families it was assigned to the maternal grandmother and to the maternal grandfather in 2 families. In a single family somatic mosaic was detected.
The presence of somatic mosaic in families with sporadic Hemophilia A in India may confound risk estimation during genetic counseling.
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