United Kingdom, May 17 -- Teddi Mellencamp is "doing great" and all of her "tumours are continuing to shrink" amid her stage four cancer diagnosis.

The 43-year-old 'Real Housewives of Beverly Hills' star shared another positive health update after confirming last month via social media that her tumours had either shrunk or disappeared since starting her cancer treatment."

She told PEOPLE: "I'm actually doing great. I had immunotherapy two days ago and they did another round of scans and they said all my tumours are continuing to shrink, so I'm feeling good and I'm happy.

"This the last round of the intense immunotherapy and then I'll be doing immunotherapy for the next two years, every four weeks, but it's like half the dosage that I'm...