How To Treat Lung Aneurysm For New Born?

Username Good evening, thanks in advance, My question is this, my sister came out of accounts on the 12th of August, but in the clinic gynecologist san jose, decided to make a cease scheduled yesterday because his first child born by caesarean tambien.7 When born, they told us what had immature lungs and that this morning would be fine, but this afternoon they told us that he had a lung aneurysm and they were going to put a respirator, that if within 48 hours did not respond , would be fatal ... What are the chances of survival? Not find anything on the internet, is it usual? Can you give more information, please? Thank you very much, really.