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Since receiving her diagnosis, the 71-year-old has undergone a tongue dissection, surgery to insert the feeding tube, a neck dissection to remove dozens of nodes, radiation, chemotherapy and immunotherapy.

And during all this, she wound up in the hospital for malnourishment and dehydration.

Simultaneously, she was treated for a deep vein thrombosis (DVT) blood clot and infection in her leg.

Keough previously told us that at some point last year, she noticed a painful sore on her tongue, which her  trusted dentist  insisted was the result of a sharp tooth that needed to be filed down - multiple times.

6 Bosworth went on to share that Keough (pictured in July) is  feeling a lot of regret due to the impacts of her treatment,  noting that part of her thinks her mom  wishes she didn't do any treatment.  karakeoughboz/instagram

6  She still is sleeping a lot and having a lot of coughing fits that cause her to vomit. She's doing twice weekly speech and swallow therapy, but we still have a long way to go,  Bosworth said. (Pictured: Keough in September 2024.) Charles Sykes/Bravo via Getty Images

The former Bravolebrity was admittedly under the impression she was dealing with a  small issue,  but after finally receiving a referral to an ear, nose and throat (ENT) doctor, she scheduled a biopsy - at the behest of Bosworth.

 That doctor took one look in my mouth and said,  That's cancer,'  Keough previously recalled, adding that the subsequent biopsy  confirmed  her worst fear.

Bosworth has said that she and her brothers - Shane Keough, 40, and Colton Keough, 34 - feel their mom could have and should have received a diagnosis sooner.