A spokesman for the Heart of England NHS Foundation Trust has said that an external review of breast surgery at Solihull Hospital found that Mr Paterson was not following new guidelines.
In a statement, he said:
[A 2007 internal] review ... identified that a surgical technique for mastectomies used by one of its consultants, Mr Ian Paterson, required closer scrutiny to establish whether it represented best practice.
An external review highlighted that this was not a usual procedure and that Mr Paterson had not followed guidelines to introduce a new technique.
This trust's position, after careful consideration, was that the technique was not an approach considered appropriate going forward, and the method was therefore stopped.
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