Vicki Gunvalson has seemingly made a shocking allegation against Tamra Barney in her latest Bravo blog.

Vicki Gunvalson Takes A Dig At Her 'Evil' 'RHOC' Co-Stars On Instagram?

Following the release of a preview clip for the upcoming three-part Real Housewives of Orange County reunion, which shows the cast questioning Gunvalson about Brooks Ayers' possibly fake cancer, Gunvalson hinted that Barney may have faked cervical cancer years ago.

"I remember back in 2012 when Tamra disclosed she was diagnosed with cervical cancer while on the Dr. Oz show," Gunvalson recalled. "It was the first time any of us had heard she was diagnosed with cervical cancer and we were all in shock that she had never talked about it prior to that. No one at that time ever asked her for her medical records, and since then we haven't heard anything about it after that does that mean she was faking it for attention?? I mean if you are diagnosed with cervical cancer isn't that pretty serious?"

Vicki Gunvalson Claims Tamra Barney Was First To Expose David Beador's Affair & Mistress' Identity

"I also pulled up this article that said Tamra wanted her breast implants removed to 'taking back control of her body' to now only a few years later put the implants back in," Gunvalson continued. "So...should we ask Tamra for her medical records to see if in fact she really had cervical cancer and lumps in her breasts? No! That would not be normal behavior and we trust that Tamra told us the truth. Just interesting we haven't heard anything about it since then."

Tune into The Real Housewives of Orange County season 10 reunion, starting next Monday night, Oct. 19, at 9 p.m. on Bravo, and check out the sneak peek below.

Tags: Tamra Barney Vicki Gunvalson Bravo Reality TV The Real Housewives of Orange County