Teddi Mellencamp's body is responding well to immunotherapy.

The 43-year-old TV star recently revealed via social media that her tumors had either shrunk or disappeared since starting her cancer treatment, and Teddi has now delivered another positive update, confirming that her immunotherapy treatment appears to be working.

During her latest appearance on 'Two Ts In a Pod with Teddi Mellencamp and Tamra Judge', she shared: "Last time, they had checked solely my brain, and those tumors are shrinking. And then, today I had the scan, where they checked my lungs and they are shrinking and one of them has shrunk so much you can barely even see it."

Despite this, Teddi will have to continue with immunotherapy - which uses a patient's own immune system to fight cancer - for the next two years.

She said: "So every four weeks for the next two years, I have to come in and get that done. And then every three months I get another scan and we check to make sure that everything is where it is."

Asked whether immunotherapy was controlling or curing her cancer, Teddi replied: "It's both.

"It's making sure that it's getting smaller and then let's say that it gets so small that it disappears, it's making sure that it won't form anywhere else in my body.

"I was a little bit worried about having to live on immunotherapy because you know how I am when I get super emotional on certain days. But I think that the fact that this is all moving in a smooth path forward is really good news."

Teddi recently revealed that her tumors had either "shrunk or disappeared".

The reality TV star took to social media to explain that she was "on course" to make a recovery, amid her ongoing cancer battle.

Teddi wrote on Instagram: "One update I couldn't wait to share!

"All tumors stage 4 (metastasized melanoma in my brain and lungs) shrunk or disappeared so I have 6ish more weeks of immunotherapy and doctors believe I will be healed if everything stays on course.

"Thank you to everyone who has sent their love, prayers, and positivity [heart emojis] (sic)"