At the annual conference of the European Society of Human Genetics in Milan, biologist Dr. Edwige Kasper from the University Hospital of Rouen presented a case involving a sperm donor who unknowingly carried a rare mutation of the TP53 gene associated with Li-Fraumeni syndrome, a severe hereditary cancer predisposition. Between 2008 and 2015, this donor fathered at least 67 children across Europe through the European Sperm Bank.
The case came to light when two families independently contacted fertility clinics after their children were diagnosed with cancers known to be associated with the TP53 gene mutation. Genetic and pediatric departments across Europe traced their clients and conducted tests on 67 children from 46 families in eight European countries. Of those children, 23 were found to be carriers of the…