Ladera Ranch probes rare pediatric cancer cluster amid environmental testing

TL;DR
A cluster of at least six cases of Ewing sarcoma in Ladera Ranch, California has prompted state and federal reviews and environmental testing. The California Department of Public Health is conducting a second look at cancer incidence in the area, while soil and water samples are being collected by Cal State Fullerton researchers to test for heavy metals and pesticides. Officials have not yet identified a specific environmental cause, and researchers caution that findings will not imply causality; results are expected by the end of 2026 as communities seek answers amid ongoing investigations and precautionary landscape changes by the local HOA.
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- Soil and water tests underway in Ladera Ranch due to cancer concerns NBC Los Angeles
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