A mother looked like "she had been involved in a car crash" after undergoing an "entirely unnecessary" mastectomy despite only having a series of benign growths, a court heard.
Marian Moran went under the knife of surgeon Ian Paterson in February 2004 after she had found a number of lumps in her left breast over the past six years.
Her husband of 35 years, Eamon Moran, said he refused to allow her parents and their daughter to see Mrs Moran following the procedure as it was "too much to witness".
Mrs Moran told the court she would have gone along with any treatment suggested by the "charming" doctor after he said scans had revealed pre-cancerous cells.
They turned out to be "little warts", the court heard.
Paterson, who was formerly employed by Heart of England NHS Trust and also practised at Spire Healthcare, is standing trial after denying 20 counts of wounding with intent against nine women and one man relating to procedures he carried out between 1997 and 2011.
Jurors have previously heard claims he carried out completely unnecessary operations for "obscure motives" that may have included a desire to "earn extra money".
The jury at Nottingham Crown Court was read a statement from publican Eamon Moran in which he said the time of his wife's mastectomy was "very vivid" as the family had just lost a friend to breast cancer.
In a statement read by prosecutor Nicholas Barraclough, he said: "She looked like she had been involved in a car crash. I didn't let her parents see her, it would have been too much for them to witness. (It was the) same for my daughter.
"I felt guilty because I had agreed to her having the operation."
Mrs Moran was aged 49 in 1998 when she first went to see her GP about a lump in her breast, with a mammogram proving inconclusive, the court heard.
She told the jury of seven men and five women that she was told growths were pre-cancerous and that Paterson suggested they should be removed, fearing they could develop into cancer.
She said: "Whatever Mr Paterson said, I would have gone along with. In my opinion he was at the top of his profession.
"He said it was pre-cancerous. I'm in no way a medical person, and it was my belief - based on what Mr Paterson led me to believe - that if these lumps kept recurring that one of them would be cancerous."
When asked by prosecutor Julian Christopher QC: "If you had thought at the time that these operations were not necessary, would you have chosen to have them?"
Mrs Moran replied: "Certainly not."
In cross-examination by defence QC Nicholas Johnson, Mrs Moran accepted she had difficulty remembering the various dates and procedures.
She said: "I don't want to remember it.
"Why would I want to go back? My belief is to go forwards."
She accepted Mr Johnson's suggestion that she had "buried" that period in her life.
Paterson, of Castle Mill Lane, Ashley, Altrincham, Greater Manchester, denies 20 counts of wounding with intent.
The trial continues.
Paterson performed the operation at Parkway Hospital in Solihull, West Midlands.