This story is free to read because readers choose to support LAist. If you find value in independent local reporting, make a donation to power our newsroom today. Listen 5:57 When Sybil first came out ...

MINNEAPOLIS -- Was one of the world's most famous medical cases a mistake? Or, worse yet, a hoax? Author Debbie Nathan's book "Sybil Exposed" explores the history of the Minnesota woman who became a ...

Add Yahoo as a preferred source to see more of our stories on Google. Sybil was a pseudonym given to Shirley Mason in a 1973 work of nonfiction by Flora Rheta Schreiber, which examined the young woman ...

MINNEAPOLIS - Was one of the world's most famous medical cases a mistake? Or, worse yet, a hoax? Author Debbie Nathan's book "Sybil Exposed" explores the history of the Minnesota woman who became a ...

She was introduced to the world as Sybil. She was later revealed to be Shirley Mason of Dodge Center, a person so horrendously abused by her mother that to cope with the trauma her mind splintered ...

Shirley Mason was the psychiatric patient whose life was portrayed in the 1973 book Sybil. The book and subsequent film caused an enormous spike in reported cases of multiple personality disorder.