Coleen Nolan has revealed she is considering a double mastectomy after two of her sisters were diagnosed with cancer.
Linda Nolan, 61, has been undergoing treatment for liver cancer while Anne, 69, has stage three breast cancer.
Their other sister, Bernie, died of breast cancer in 2013 at the age of 52. The women were part of Irish family pop group The Nolans.
Coleen, 55, said the disease could be caused by a "rogue gene" from her father's side of the family and said she is considering elective surgery to minimise her chances of falling ill.
They are the Nolan Sisters and they live at Ilford. L/R Anne (24), Denise (22), Maureen (20), Linda (15), Bernadette (14), Coleen (9). December 1974 74-7611-002 (Photo by WATFORD/Mirrorpix/Mirrorpix via Getty Images)
June 1979 P009923 (Photo by WATFORD/Mirrorpix/Mirrorpix via Getty Images)
The Nolan Sisters arrive at the Lyceum Ballroom in London when they were presented with a special award by Princess Anne at the Carl-Alan Awards ceremony. Left to right; Linda Nolan, Coleen Nolan, Bernie Nolan, Maureen Nolan and Anne Nolan. (Photo by PA Images via Getty Images)
UNSPECIFIED - JANUARY 01: Photo of NOLAN SISTERS and Coleen NOLAN and Bernadette NOLAN and Linda NOLAN and Maureen NOLAN; Posed group portrait L-R Coleen, Bernadette (front), Linda and Maureen Nolan (Photo by Virginia Turbett/Redferns)
The Nolan sisters, L-R Coleen (15), Linda (21), Maureen (26) and Bernadette (20), leaving Heathrow Airport for Japan to promote their latest record 'I'm In The Mood For Dancing' which is number 1 in Japan. 15th October 1980. (Photo by Victor Crawshaw/Mirrorpix via Getty Images)
LONDON, UNITED KINGDOM - NOVEMBER 30: (L-R) Anne Nolan, Coleen Nolan, Linda Nolan, Bernie Nolan and Maureen Nolan of The Nolans perform on stage at the Dominion Theatre, on November 30th, 1982 in London, England. (Photo by Pete Still/Redferns)
The Nolan Sisters left to right : Bernie Nolan, Maureen Nolan, Coleen Nolan, Linda Nolan Picture taken 9th December 1980. (Photo by Peter Cook/Mirrorpix/Getty Images)
LONDON, UNITED KINGDOM - NOVEMBER 23: Coleen Nolan, Anne Nolan, Bernie Nolan and Maureen Nolan of The Nolans perform on stage at the Dominion Theatre, on November 30th, 1982 in London, England. (Photo by Pete Still/Redferns)
TV STAR SHANE Richie AND WIFE COLEEN NOLAN ATTEND THE NATIONAL TELEVISION AWARDS AT THE ROYAL ALBERT HALL, LONDON *16/08/2001...One-time chart star Coleen Nolan and Model Twiggy were today, Thursday 16th August 2001, unveiled as two of the presenters who will replace Richard and Judy on ITV's This Morning. The programme is set to return in early September with the pair working alongside John Leslie and Fern Britton to front the show in rotation. Behind the scenes moves to find new faces for the show have been shrouded in secrecy. The role is one of the top jobs in television and with Richard Madeley and Judy Finnigan in charge, This Morning became one of the best known shows on British TV. They quit for a lucrative deal with Channel 4 this summer. Coleen told PA News : "I just can't describe how I feel. I'm just honoured that they even considered me, let alone gave me the job. 08/03/02: Colleen Nolan arriving at the National Television awards at the Royal Albert Hall, London. Presenter Coleen Nolan is to take a reduced role on ITV1's This Morning after stepping down as one of the main hosts, show chiefs said. The former chart star has been fronting the show one day a week since its relaunch in September after the departure of Richard Madeley and Judy Finnigan, but journalist Jane Moore has now taken over her Friday appearances, alongside regular presenter John Leslie. (Photo by Sean Dempsey - PA Images/PA Images via Getty Images)
ITV's Loose Women presenter Coleen Nolan pictured at home with Fiancee Ray Fensome and Daughte Ciara; 1st April 2007; Job: 22114; Ref: ZB3000_166627_001OOO / L.Lawry; Exclusive (Photo by 101 Productions/Photoshot/Getty Images)
LONDON - SEPTEMBER 3: 'Loose Women' Presenters (L-R) Jane McDonald, Carol McGriffin, Sherrie Hewson, Coleen Nolan, Jackie Brambles, Andrea McLean and Lynda Bellingham receive the award for Best Daytime Show at the TV Quick & TV Choice awards at the Dorchester Hotel September 3, 2007 in London, England. (Photo by Stuart Wilson/Getty Images)
LONDON - MARCH 19: TV presenters Jackie Brambles, Jane McDonald and Coleen Nolan attend The Royal Television Society Programme Awards held at the Grosvenor House Hotel on March 19, 2008 in London, England. (Photo by Ferdaus Shamim/WireImage) *** Local Caption ***
(From left to right) Coleen Nolan, Sherrie Hewson, Carol McGiffin, Jane McDonald and Denise Welch are seen celebrating with their No1 best selling book Loose Women Girl's Night In, at the London Studios. (Photo by Ian West - PA Images/PA Images via Getty Images)
LONDON, ENGLAND - SEPTEMBER 07: L-R Jane McDonald, Lisa Maxwell, Sherrie Hewson, Andrea Mclean and Coleen Nolan of 'Loose Women' attend the TV Quick & TV Choice Awards Champagne reception held at The Dorchester on September 7, 2009 in London, England. (Photo by Dave Hogan/ Getty Images)
MANCHESTER, ENGLAND - OCTOBER 13: Singer Coleen Nolan (C) and sons Shane Richie, Jr. (L) and Jake Richie attend The Nolans Aftershow party at Via on October 13, 2009 in Manchester, England. (Photo by Shirlaine Forrest/WireImage)
MANCHESTER, ENGLAND - OCTOBER 13: Bernie Nolan, Maureen Nolan, Linda Nolan and Coleen Nolan of The Nolans performs at Apollo on October 13, 2009 in Manchester, England. (Photo by Shirlaine Forrest/WireImage)
The presenters of Loose Women collect their award fotr best Factual programme during the National Television Awards 2010, at the 02 Arena, London. L-R Andrea Mclean, Lynda Bellingham, Zoe Tyler, Carol McGiffin, Coleen Nolan, Kate Thornton, Denise Welch Leslie Garrett, Lisa Maxwell and Jane McDonald (Photo by Ian West/PA Images via Getty Images)
(left to right) Denise Welch, Carol Mcgiffin, Kate Thornton, Andrea McClean, Zoe Tyler, Coleen Nolan, Jane McDonnald, Lisa Maxwell, Lynda Bellingham and Sherrie Hewson of the Loose Women team celebrate winning the award for Best Factual Programme, at the National Television Awards 2010, at the 02 Arena, London. (Photo by Zak Hussein/PA Images via Getty Images)
Presenters from Loose Women including Lynda Bellingham, Zoe Tyler, Carol McGiffin and Coleen Nolan (left to right) celebrate wining the award for Best Factual Programme during the National Television Awards 2010, at the 02 Arena, London. (Photo by Yui Mok/PA Images via Getty Images)
LONDON, UNITED KINGDOM - APRIL 04: Bernie Nolan (L) and Coleen Nolan sighted leaving the ITV studios on April 4, 2011 in London, England. (Photo by Simon James/FilmMagic)
(left to right) Andrea McLean, Denise Welch, Zoe Tyler, Coleen Nolan and Kate Thornton of Loose Women arriving for the 2011 National Television Awards at the O2 Arena, London. (Photo by Yui Mok/PA Images via Getty Images)
LONDON, UNITED KINGDOM - SEPTEMBER 25: Linda, Coleen, Bernie and Maureen of the The Nolans sighted at BBC Radio 2 on September 25, 2012 in London, England. (Photo by SAV/FilmMagic)
Coleen Nolan and Carol McGiffin (left to right) celebrate winning the award for Best Factual Programme at the National Television Awards 2010, at the 02 Arena, London. (Photo by Yui Mok/PA Images via Getty Images)
BOREHAMWOOD, ENGLAND - JANUARY 03: Coleen Nolan enters the Celebrity Big Brother House at Elstree Studios on January 3, 2017 in Borehamwood, England. (Photo by Mike Marsland/WireImage)
LONDON, ENGLAND - JANUARY 20: Nadia Sawalha, Kaye Adams, Jane Moore, Gloria Hunniford, Andrea McLean, Penny Lancaster, Sherrie Hewson, Jamelia, Coleen Nolan and Katie Price attend the 21st National Television Awards at The O2 Arena on January 20, 2016 in London, England. (Photo by David M. Benett/Dave Benett/Getty Images)
CREWKERNE, ENGLAND - NOVEMBER 03: Christopher Biggins, Coleen Nolan and Nickolas Grace attend the funeral of Lynda Bellingham on November 3, 2014 in Crewkerne, England. (Photo by Danny Martindale/WireImage)
MANCHESTER, UNITED KINGDOM - OCTOBER 27: Coleen Nolan appears at Coleen Nolan Halloween Party Loose Women star hosts a Halloween party in aid of the children's cancer charity Saras Hope Foundation on October 27, 2012 in Manchester, England. (Photo by Nathan Cox/FilmMagic)
BOREHAMWOOD, ENGLAND - FEBRUARY 03: Coleen Nolan is crowned the winner of Celebrity Big Brother on February 3, 2017 in Borehamwood, United Kingdom. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - OCTOBER 30: (L-R) Nadia Sawalha, Coleen Nolan, Saira Khan and Kaye Adams attend the Pride Of Britain Awards at the Grosvenor House on October 30, 2017 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - JANUARY 22: Jane Moore, Saira Khan, Nadia Sawalha, Coleen Nolan and Stacey Soloman attend the National Television Awards held at the O2 Arena on January 22, 2019 in London, England. (Photo by Stuart C. Wilson/Getty Images)
Gloria Hunniford, Coleen Nolan, Linda Robson, Andrea McLean attend the White Christmas Press Night at the Dominion Theatre, London 25 November 2019. (Photo by Robin Pope/NurPhoto via Getty Images)
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She told the Mirror: "Of course. Seeing what Anne and Linda are going through has made me think a lot about having a mastectomy.
"I've been lying in bed at night, looking down at my breasts and thinking, 'Am I just walking around with two timebombs here?' If that's a possibility, maybe I need to get rid of them."
The Loose Women star has three children – Shane Jnr, 31, Jake, 27, and 19-year-old Ciara – and said they are "terrified" of the illness.
"My kids definitely think I should investigate surgery" she said. "They're absolutely terrified because they've seen cancer ravage our family."
Coleen said she had a breast cancer scare in 2009 while competing in Dancing On Ice and now sees a specialist every year to check for abnormalities.
Linda appeared on Good Morning Britain this week and said undergoing cancer treatment while being isolated from loved ones was a "double nightmare".
And she said she had been "traumatised" by losing her hair to chemotherapy. "I managed to keep my hair a little bit last time," she said.
"I was traumatised by it. I feel vain saying that the worst thing at the moment is I have no hair, but it has been traumatising for me. It's been a massive shock."