Cause of death revealed for 9-year-old who died after dental procedure in Vista

In a preliminary report, the medical examiner lists her cause of death as methemoglobinemia. It’s a rare condition affecting how blood cells deliver oxygen to other cells and tissues.

  In a preliminary report, the medical examiner lists her cause of death as methemoglobinemia. It’s a rare condition affecting how blood cells deliver oxygen to other cells and tissues.