Surprising cause of death revealed for 17-year-old girl who died suddenly during a dentist appointment.
Sophia Farmer, 17, was reported unresponsive during a visit to have her wisdom teeth removed.
The teenager was under anesthesia for the operation.
Paramedics rushed Farmer to Advocate Connell Medical Center in Libertyville, Illinois, on July 21 at 8:30 a.m. Lake and McHenry County Scanner was mentioned.
He was reported to be in critical condition when he arrived at the hospital.
The teenager was later taken to Advocate Children’s Hospital in Park Ridge, Illinois, about 18 miles outside of Chicago.
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Farmer died on July 24, three days after being rushed to hospital.
At the time, her cause and manner of death were pending from the medical examiner’s office.
In July, police said the death was under investigation.
Officers noted that the dental office was “very cooperative” throughout, but the case would “take some time” to resolve.
Three months after Farmer’s death, the medical examiner’s office announced in October what had caused the young woman’s tragic end.
The farmer’s official cause of death was complications from tooth extraction surgery.
The secondary cause of death was related to ARID1B gene mutation and neurological abnormalities.
ARID1B is a rare genetic disorder that can cause developmental delays and disabilities.
Those with the mutation will likely need ongoing care throughout their lives.
There is no proven association between the disorder and anesthesia.
Sophie Farmer’s obituary
It is with heavy hearts that we announce the passing of our beloved daughter, Sophia Kaitlyn Farmer. She was welcomed into the arms of Jesus on Thursday, July 24, 2025, surrounded by family and friends.
From the moment she came into our lives, Sophie filled our hearts with countless love and laughter. She enjoyed boating, camping and never met a dog she didn’t want to keep.
Above all, Sophie loved the Lord. She was active in her youth group and enjoyed singing in the worship group. She had a tender heart for others and you would often find her praying for her friends.
Sophie is survived by her parents, Matt and Marsha; her sister, Emily. her brother, Jacob; grandparents, Antonio and Lidia Kubiuk; and grandparents, Michael and Billie Farmer.
She is predeceased by her sister, Hannah. and her great-grandparents William and Phyllis Farmer.
Source: Legacy
The farmer’s death was ruled “natural”.
As for the police investigation, the department is reportedly awaiting the final report of the medical examiner before proceeding with the case.
The teenager’s family wrote in an obituary that she filled their hearts with “countless love and laughter”.
“She loved boating, camping and never met a dog she didn’t want to keep,” the obituary said.
“Above all, Sophie loved the Lord. She was active in her youth and enjoyed singing in the worship group.
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“She had a tender heart for others and you would often find her praying for her friends.”
The teenager leaves behind her parents, sister, brother and grandparents.
