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Rare Cancer Cluster Sparks Investigation Calls in Orange County
22 Jul
Summary
- Six children diagnosed with rare Ewing sarcoma in Ladera Ranch.
- Community members suspect herbicide use; officials await reviews.
- Experts doubt a clear environmental link can be found.

California Governor Gavin Newsom faces calls for a state-led investigation into a series of rare childhood cancer diagnoses in Ladera Ranch, Orange County. Assemblymember Kate Sanchez formally requested the governor launch a coordinated probe following reports of at least six children diagnosed with Ewing sarcoma.
Community members have voiced concerns, suggesting that the use of herbicides in the area could be a contributing factor. Orange County Supervisor Katrina Foley has asked the California Department of Public Health to expedite its ongoing review of these cases.
While state health officials have not confirmed a cancer cluster or identified a cause, the number of reported diagnoses in the community of approximately 26,000 residents has alarmed families. U.S. Attorney Bill Essayli has also asked the Environmental Protection Agency to investigate potential environmental factors.
Experts note that the cause of Ewing sarcoma is largely unknown, with no established environmental links, and that community clusters can sometimes arise coincidentally. They express skepticism about finding a definitive environmental cause, citing the low incidence of such rare cancers and the track record of cluster investigations.