I never knew it had a name. But have often observed certain cancers ran in families. Glad testing turned out well for you and your kids.
Don’t feel guilty. You gave me the opportunity to spread the word. Some FReeper somewhere is probably wondering about clusters in the family and will now do a genetic investigation.
It is expensive. A lab wanted ~$4K to do the study on me. A local cancer hospital negotiated the price down to $440.
Have fun!