California Families Seek Answers Amid Unusual Cancer Surge

WHO:

Fox News - At least six children in Ladera Ranch, California, have been diagnosed with Ewing sarcoma.

Fox News - Dr. Janet Yoon, a pediatric oncologist and sarcoma specialist at City of Hope in Los Angeles, commented on the situation.

Fox News - Dustin Matteson, father of 17-year-old Brody Matteson, who died from complications of treatment for Ewing sarcoma.

Yahoo - California Department of Public Health (CDPH) and California Environmental Protection Agency (CalEPA) are involved in the investigation.

Fox News - Jennifer Piazza, Ph.D., professor in the Department of Public Health at Cal State Fullerton, is leading environmental sampling efforts.

WHAT:

Fox News - A cluster of rare cancer diagnoses has prompted environmental testing and a state health review in Ladera Ranch.

Yahoo - The California Department of Public Health is conducting a second review of cancer incidence data for the Ladera Ranch area.

Fox News - The CDPH estimates that the assessment will be completed in fall 2026.

Fox News - Ladera Ranch Maintenance Corporation (LARMAC) has temporarily paused its use of certain landscape chemicals and formed an advisory committee.

Fox News - Environmental sampling is being conducted to analyze soil and water for heavy metals and pesticides.

WHERE:

Fox News - The events are taking place in Ladera Ranch, California.

Fox News - Environmental samples are being collected from local parks in Ladera Ranch.

WHEN:

Fox News - Brody Matteson died in March 2026.

Fox News - The CDPH stated that the assessment is expected to be completed in fall 2026.

Fox News - On Sept. 14, researchers from California State Fullerton began collecting soil and water samples.

WHY:

Fox News - Families are concerned about the potential link between the cancer cases and the community's use of herbicides and pesticides.

Fox News - The investigation was prompted by residents' concerns regarding the increase in pediatric cancer cases.

HOW:

Fox News - The California Department of Public Health conducted a county-level review to determine if pesticide use could have played a role in cancer development.

Fox News - Environmental sampling involves collecting soil and water samples for analysis of heavy metals and pesticides.

(UPDATED September 17, 2026 07:11 UTC)

In Ladera Ranch, California, a concerning cluster of Ewing sarcoma diagnoses among at least six children has led to an investigation by the California Department of Public Health and the California Environmental Protection Agency. Families are worried about a potential link between these cancer cases and the community's use of herbicides and pesticides, prompting environmental sampling to analyze soil and water for harmful substances. The California Department of Public Health is conducting a second review of cancer incidence data, with the assessment expected to be completed in fall 2026.