Newstalk presenter and former Dragon's Den star Bobby Kerr has been diagnosed with cancer of the head and neck.

The 55-year-old businessman told listeners of his diagnosis on his radio show, Down to Business, and revealed her would be taking a six week break from Newstalk for treatment.

Kerr, who owns the Insomnia Coffee Company franchise said: "Before I go, there's something of a slightly personal nature," he told listeners of his Saturday morning radio show.

"Guess what? I've currently been diagnosed with cancer of the head and neck and I'm undergoing treatment to make myself better.

"Why am I telling you this? What you might consider a very personal piece of news? The reason is simple. It's Movember. It's men's health month, get yourself checked - I did.

"I have a very serious disease, it's been caught early. It's only in one place and because it's been caught early, my chances of beating this increase incrementally. That's why I'm telling you guys, you should go out there and get yourself checked."                                                     

Kerr, who appeared on four series of RTÉ's Dragon's Den from 2008 – 2012, also took the time to thanks his family and friends, especially his wife Mary and their four daughters Meghan, Emily, Rebecca and Michaela, who he said are his "secret weapon" to beating cancer

“Big thanks to Mary and the girls. I’m blissfully cohabiting with five loving females –that’s my secret weapon in beating this. My mother, my brothers and sisters, they’re also part of arsenal, my partners and colleagues in Insomnia coffee.

“This is my arsenal of armoury to beat this disease. The bad news is I’m going away ‘til the new year to get myself better, but I will be back, as Arnie said.

"I get the opportunity to wish you a very early and prosperous 2016. God bless you an all thanks and I'll see you next year."