Thank you for your email, and I realize what you meant now. Sequencing my DNA to protect my children from the risk that my cancer has a genetic basis... very thoughtful.

Yes, I'd do this if I could find a researcher willing to help, and if I thought my disease had a genetic basis. As it is, I've put it down to "dumb bad luck" and there's no sequencing that.

I'll explain: my family has no history of cancer. We tend to die from natural causes, not too late, not too early. I'm unusual. The cancer originally in my bile duct is also extremely rare in Europe and America. Yet it turns out to be a main (if not the main) cause of death among 50+ males in certain east Asian countries.

So it's (almost certainly) a liver fluke carried in raw farmed fish, which is slipping into the global trade as "sea fish" and being used in cheap sushi restaurants. The fluke attaches to the bile duct and produces carcinogens because it likes feeding off the tumors.

The bad news is there are going to be a lot of western men in their 50s who get dramatically bad news out of nowhere, as this parasite must now be lodged in tends of thousands of us. Good news is this killer will finally benefit from some real attention, to the benefit of all.

Interestingly, women are almost entirely unaffected.

So while sequencing my DNA wouldn't help much in my case, there is one message I'd like to send to the world: "Stop eating fish. Fish is shit." One should not be eating wild proteins anyhow. It's unethical IMO.