Kris Jenner almost lost her leg when she was a child.

The 62-year-old matriarch was diagnosed with a bone tumour when she was young and her family were warned that she faced the possibility of having her limb amputated if the mass was found to be cancerous.

She said: ''That's what they told my mom. The technology in those days was they couldn't tell if it was cancerous or not until they got in there, and if it was, they were going to have to amputate.''

But the 'Keeping Up With the Kardashians' star was too young to understand the seriousness of the situation or the fact she was ''lucky'' to have survived.

Speaking in a preview clip for her upcoming appearance on Harvey Levin's 'OBJECTified', she said: ''I didn't really understand at the time the impact of what was going on around me and how lucky I was to have survived that.''

Elsewhere on the show, Kris spoke of her ''regret'' at cheating on late husband Robert Kardashian - the father of her oldest children, Kourtney, 39, Kim, 37, Khloé, 34, and 31-year-old Rob - and admitted she was devastated when he filed for divorce in 1991 after he found out about her affair with a soccer player.

She said: ''I married Robert when I was 22 years old and I got pregnant on my honeymoon -- I had the happiest life you could've dreamt about. But when you're in something, sometimes people think the grass is always greener and that was like what I think I went through at some point.

''I did [have an affair] Which wasn't -- nothing I'm proud of. When I look back on it now, probably one of my biggest regrets in my life is that that marriage fell apart.

''I was devastated when he filed for divorce because it made it real. Like, you think you're going to come through this period -- that was really hard for me.''

However, Kris - who also has daughters Kendall, 22, and Kylie Jenner, 20, with second ex-husband Caitlyn Jenner - was struck yet another blow when Robert cut off all of her credit cards.

She explained: ''I didn't have anything. I went to the market one day and my credit card didn't work. I had a market credit card and I'm like, 'I can't even buy a tomato.' ''