Sarcoma and sports balls / apples

My father has been diagnosed with a pleomorphic rhabdomyosarcoma on his right outside thigh, in the same place he has been rubbing apples (coated in pesticides) against like a sports ball. I would be very interested to hear of other people with various forms of sarcoma, who may have some pesticide link. That is who rub baseballs or cricket balls against their thigh, which have been on the grass treated with chemicals. Or perhaps who rub fruit such as plums, apples, etc on their thigh or other area where they have a sarcoma tumor.