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Researchers descend on cancer cluster community to find cause of deadly disease

September 15, 2026
in News
Researchers descend on cancer cluster community to find cause of deadly disease

Additional environmental testing officially started in a wealthy Southern California community on Sunday after six cases of a rare cancer diseasesparked massive concerns.

Cal State Fullerton students and researchers gathered samples from three parks in the Ladera Ranch area in Orange County following outrage from residents after the rare bone and soft issue cancer called Ewing sarcoma made its way through members of the community.

The researchers went to the parks to see if there were any environmental links to the cancer cases.

High-angle view of houses in Ladera Ranch, Southern California.
A high angle view of a house in a fenced residential area is seen on Saturday, July 3, 2021, in Ladera Ranch, Southern California. Getty Images/iStockphoto
A professor from Ladera Ranch demonstrating soil and water testing techniques to a group.
Professor Daniel Curtis from Call State Fullerton. NBC 4

“It’s very difficult to prove causation, and we don’t even know that this is environmental. It could be something else that’s potentially causing childhood cancers, but what we want to do is figure out if there is something in the environment. We can figure out if it’s here,” Professor Daniel Curtis of the chemistry department told NBC 4.

Researchers from the university could get test results as early as the end of this week.

This comes as Ladera Ranch residents demanded that its homeowners association stop spraying pesticides.


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Illustration announcing a LARMAC Board meeting to discuss pesticide use and land management in Ladera Ranch.
The LARMAC Board meets at the Covenant Hills Clubhouse on Wednesday, Sept. 9, 2026. The meeting addresses pesticide use, land-management practices, and the direction of the community. Instagram/protectladera

During a Ladera Ranch Maintenance Corporation meeting last Wednesday, at least 10 residents spoke about pesticide use. One mother in attendance was someone who had lost her son to cancer earlier this year.

While there are no clear evidence that pesticides caused the disease, the deaths of several young people in the small community from the rare cancer fueled residents’ fears.

A person wearing blue gloves collects a sample of soil in a clear plastic container.
Soil and water tests are underway in Ladera Ranch due to cancer concerns. NBC 4
Three people wearing gloves perform soil and water tests on a patch of grass.
Tests began on Sunday. NBC 4

A 2024 county-level review was taken but the analysis did not find any unusual pattern. However, the community acknowledged the limited data during that time and called for a more “focused assessment.”

Ewing sarcoma most often affects young children and teens. It also only accounts for about 1% of childhood cancers, with 225 children being diagnosed per year according to Johns Hopkins.

Despite that, surrounding areas in and around Ladera Ranch have recorded 9 to 12 cases of Ewing and synovial sarcoma, with six reported deaths.

Lily Dalton smiling and looking back at the camera.
Lily Dalton, a Ewing Sarcoma victim who passed in January at 23. GoFundMe
Haven Keetch is pictured.
Haven Keetch is pictured. The 18-year-old was diagnosed with a rare soft tissue cancer but survived after amputating her leg. Facebook/@haven.keetch

A 23-year-old girl named Lily Dalton died in January while a 17-year-old male named Brody Matteson passed away in March.

People from USC have also agreed to conduct their own research.

The post Researchers descend on cancer cluster community to find cause of deadly disease appeared first on New York Post.

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