India, Feb. 13 -- Kyle Richards, 56, rushed to her Real Housewives of Beverly Hills co-star Teddi Mellencamp's side as she underwent emergency brain surgery on Wednesday. The 43-year-old took to social media to announce that she had been diagnosed with "multiple tumours" that doctors believe had been growing for at least six months.

In a video shared on her Instagram story, Mellencamp was seen on a hospital bed with Richards and Morgan Wade by her side. "Yup, here we go!" the Two T's in a Pod host says in the clip, adding, "We're all getting ready. How many minutes? What's the countdown?"

As Mellencamp turned the camera towards her RHOBH co-star and the 30-year-old country singer, they waved and smiled. She was then told there she was j...