FREDERICTON - A senior oncologist in Newfoundland and Labrador has told a public inquiry that she was contacted by a New Brunswick physician in 2006 concerning problems with breast cancer tests at a Fredericton laboratory.

Dr. Kara Laing, who played a key role in responding to flawed hormone receptor tests in Newfoundland, says the New Brunswick doctor was looking for advice on how to handle problems with hormone tests for breast cancers at the Fredericton lab.

Laing was testifying at the judicial inquiry on flawed breast cancer tests in St. John's earlier this week.

Health officials in Fredericton say they are searching records to identify the doctor and the laboratory in question.

Laing says the New Brunswick oncologist told her the Fredericton hormone receptor tests, which are critical in deciding treatment for breast cancer, were affected by what he described as a "ph issue."

The Newfoundland inquiry is examining how hundreds of breast cancer patients received the wrong results on hormone receptor tests, which were used to determine the treatment they received.