
Health officials are investigating reports that 6 children from Ladera Ranch, California have been diagnosed with Ewing sarcoma, an extremely rare bone cancer that affects only about 200 to 240 children and teens in the United States each year, or roughly 3 cases per 1 million people under age 20 annually.
Officials are reviewing whether the cases represent a true cancer cluster, but no cause has been identified and no environmental link has been established.









