I write on behalf of my sister who's boy is now 13 months of age. He use to be a reasonable sleeper but at 6 months of age was diagnosed with testicular cancer. Following surgery it was fortunate that he did not need treatment but he has to undergo regular weekly blood tests. Since the detection of his cancer he has been a terrible sleeper. It is not so much of a problem to get him to sleep but actually keeping him asleep. He has basically slept with my sister since his surgery but even will not sleep when he is in bed with her. He quite often wakes every 15-20 minutes in quite a hysterical state and requires either comforting or even a bottle to calm. He has been seen many doctors, naturopaths and even been to a sleep clinic. She has tried controlled crying which worked well for my 8 month old son but had no effect what so ever on my sisters child. Has anyone had a child which has experienced such traumatic surgery at a young age which may have affected their sleep. If so, how did you deal with it?