United Kingdom, April 24 -- Teddi Mellencamp's tumours have "shrunk or disappeared".

The 43-year-old TV star has taken to social media to reveal that she's currently "on course" to make a recovery, amid her ongoing cancer battle.

She 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)"

Teddi also shared a positive update via an accompanying video message.

She said: "Honestly, the crying is already done, but I just finished with all of my sc...