A surgeon performed an operation to remove the gall-bladder of a woman, despite having taken the organ out of her 13 years earlier.
Health and Disability Commissioner Anthony Hill describes the mistaken operation in a report released on his website today.
"When she saw the surgeon, the woman was unable to recall the previous surgeries she had undergone," says a summary of the report in which Mr Hill finds that the unnamed general surgeon and the Waikato District Health Board breached the code of patients' rights.
"The surgeon was sent a CT scan which identified that she did not have a gall bladder but he mislaid the scan and then failed to connect it with the patient, despite her asking about the scan."
The operation was performed by minimally-invasive keyhole surgery.