(CNN) The president of Virginia Gov. Ralph Northam's medical school said that other yearbooks had a number of photos that were "shockingly abhorrent" and inappropriate, including as recently as 2013.

"There's been a pattern," Eastern Virginia Medical School President and Provost Richard V. Homan said on Tuesday. "Some are repugnant. Some are unprofessional. Some are shockingly abhorrent, like I mentioned."

Homan said when he was informed about inappropriate images in the 2013 yearbook, he decided to discontinue the yearbooks. None have been made since that year.

Homan spoke days after the discovery of a racist photograph that appeared on Northam's page in the 1984 medical school yearbook. The photograph shows one person dressed in blackface and another in the KKK's signature white hood and robes.

Northam initially apologized for the photo and said he was in it, but in a news conference Saturday, he denied that he was in the image and said he would not resign as governor.

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