2 Broken bones and cysts

My 14 year old son is a Wilms Tumor survivor.  Despite an obstruction a few year ago, he is relatively healthy.  During a baseball game he broke his left hand.  3 weeks later he broke his right wrist during another game. 2 broken bones in 3 weeks.  During the xray and CT scan, they also indicated that he had cysts.  I know sometimes ganglion cyst (which in themselves are not a big deal), are misdiagnosed. They just kind of said it in passing, but this is an orthoped that has not reviewed his history.  Between the broken bones, the painful joints, fatigue and these cysts, should I be concernced there might be something more going on? Our pediatrician has referred us back to a survivorship clinic which we are scheduled to go to in a few weeks, but in the meantime I was just wondering if anyone has had any of these experiences.