h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

Glad to see this very understandable entry on something quite distressing.

My nephhew had it, and had surgery at 6 weeks age. His urine was so dark they thought it was blood, but it was dehydration. Within days he was such a happy baby, compared to the very hungry and thirsty little one just befor the operation. Now he's as happy and well as any other ten year old!

Although 23 years ago now my son had this at just 3 weeks old. I visited our GP every day and his weight was monitored - however as he was so young the condition wasn't thought about until I pointed out he was below his birth weight. A hospital visit and a wonderfully calm consultant who knew her job allayed our fears. However after the operation my son contracted an infection in the wound (I don't think key hole surgery was an option then) and was hospitalised for a long time with round the clock care when he came home.
My advice would be to be vigilant - projectile vomiting means something is wrong - keep on top of the situation (which is hard so soon after birth I know)
My son is a healthy 23 year old now - however he has adhesions at the wound site due to the infection he sustained - but to be fair it doesn't seem to affect him in any way.
With regard to hereditary - we have no knowledge of any other member of our family that has had this complaint. I just wonder where it starts??