Comedian Katherine Ryan has revealed doctors misdiagnosed her before being told she has melanoma. The TV star shared the heartbreaking news of the return of her skin cancer on a new episode of her podcast. She had been diagnosed with melanoma before and was initally given the all-clear when she went to check a mole on her arm. Katherine had booked into see a doctor when she became concerned about a mole that "kept changing". The podcaster admitted: "I know a lot about melanoma, I had stage two melanoma as a very young woman - aged 21 - on my leg, I’ve spoken about that before. "It was flat, it wasn’t that big but it was melanoma. It is a deadly form of skin cancer and it does spread quickly. I just thought that this mole wasn’t right. It’s on my arm. I showed pictures of it on my social media. I went in and I wanted the doctor to remove it and stitch it up in a straight line." However, Katherine was met by an unexpected response when she headed to see her doctor. She was told she didn't have melanoma and was "totally fine". Katherine revealed: "But even when he looked at it, he was like, ‘it’s not melanoma, it’s totally fine, I will do a shave and send it away for testing’." Yet, the doctor soon called her back and confirmed it was melanoma. Katherine explained it is early melanoma and the doctor was "shocked" that he didn't recognise it. Speaking on her podcast, Telling Everybody Everything, episode last week Katherine revealed: “I’m covered in about 5,000 moles and I had melanoma when I was 21, I had a golf ball size of my leg removed. "The melanoma, obviously, wasn’t that big but they do at least two centimetres on each side to make sure they get all the borders. It was stage 2 at the time which I’m told would be downgraded to stage one now the way they define it. I had no lymphatic involvement but once you do, melanoma is so aggressive and it spreads so fast.” She added: “I went in to the Cadogan clinic. If you go private with anything, you know, try to set aside as much money as you can for these private healthcare emergencies because, it was not an emergency, but I know if I went through the NHS they’d be like, ‘meh it’s fine' and I did have this mole looked at for like £200 by a private clinic near Harley Street and the guy – the consultation was seven minutes long – and the guy was like, ‘no that’s no melanoma it’s blah, blah, blah' – I forget the name he used. "But it’s an inflamed, very red changing big mole. And I thought, ‘no I’m not just gonna take…' cos it feels nice to get an answers like that, ‘no it’s not melanoma'… ‘oh great well I’ll be on my way' but you can’t just walk away with an answer like that. If it’s different, if it’s changing, if it’s on your body it’s just better safe than sorry." Katherine explained: "So I rang up the Cadogan Clinic and they have a plastic surgeon there and a dermatologist – I think they’re known for lipo I don’t know why Cadogan came up but it’s near Harrods, it cost me a grand but I was like, ‘I wanna go in on exactly this Friday that I have off and I wanna get the mole removed' and they were like, ‘bet’. That’s what I love about private healthcare. “And this guy was like, ‘Oh yeah it does not look like melanoma to me’ he explained to me, ‘there is a little freckle sized thing on the bottom of it that I’d like to maybe take a look at but I think it might be basal cell carcinoma if anything but maybe not'. He used some other word that I didn’t know but he said, 'you know there is something that is inflaming the surface of this mole and you don’t like it let’s take it off'.” Normally when I have had moles taken off, they cut all around them and it is pretty deep and then they stitch it into a line and the scar heals in one straight line. But this guy was like, 'oh it doesn't have to go that deep we will just do a shave removal', which is still a little bit deep. The difference is they don't stitch it up together in a line so I have a hole in my arm that is way bigger than I thought it was going to be." The Macmillan Support Line offers confidential support to people living with cancer and their loved ones. If you need to talk, call us on 0808 808 0000. Like this story? For more of the latest showbiz news and gossip, follow Mirror Celebs on TikTok , Snapchat , Instagram , Twitter , Facebook , YouTube and Threads .