Please pray for my young nephew

I would greatly appreciate prayers for my young nephew, Freddie. He has Beckwith Wiedmann Syndrome, so he has a 10% chance of getting kidney or liver cancer before 10 of age. Every 3 months until the age of 10 he'll have blood tests and ultrasound tests to be sure he's okay. After the 10 of ten, when growth starts to slow, he'll be in the clear. He's just a toddler now, so he has many years to go. Please also pray for his parents, my sister and her husband. They're obviously under a great deal of stress right now. Thank you!