Jeez Ralph, I'm so sorry to hear that news, you must both be so shocked. I work in health but not specifically in mid/paeds so can't give you any inside info on the condition. I imagine that if you've seen a perinatal specialist and had the US's then they would be fairly certain about the condition and prognosis, particularly if one of the US's was done by an OB specialising in diagnosis. Have you had an amniocentesis or CVS? I understand these conditions are often associated with other major genetic conditions too, which might have something to do with the advice you've received.

From what I can see on the reliable medical websites I visit, it looks like the combination of the two conditions means a bad outcome (pretty much certain the foetus isn't able to survive). I've read some cases where the baby has survived, but this is mostly where the hygroma is anterior and if there is only one, and with no hydrops. I have also read some stories people have written who decided to continue the pregnancy after diagnosis however the majority went on to lose their baby before birth at some point. The cases where the hygroma resorbed tended to be in anterior single simple hygromas without any other genetic problems, which sounds a bit different from the US info you have.

Ralph, I'm not a Dr and I don't know all the info, but I am wishing you and your wife the best whatever decision you make and whatever happens. It's a tragic thing to lose a much loved child no matter when it happens. I'm thinking of you all.