In October actress Lynda Bellingham sadly died at the age of 66 after colon cancer spread to her lungs and liver.
Now her son has spoken out to say he believes his mother's life would have been saved had she had a colonoscopy.
Michael Peluso, 31, said other tests "missed" Bellingham's colon cancer, as he spoke publicly for the first time since her death.
"She was a massive champion for getting a colonoscopy. It would have saved her life," he told the Mirror.
"They missed it so much. She had two stool tests, a blood test and they never found it. She was carrying cancer for 18 months before she discovered she had it."
A colonoscopy is a procedure that allows doctors to look at the lining of a patient's large bowel for polyps, inflammation or signs of cancer.
According to the Mirror, Bellingham said before she died: "I always had a stool test and had always gone for a check up but this (cancer) hides.
"Put £1 away for a colonoscopy when you are 60. It's the only way you can know for sure."
Bellingham, 66, known for her role as the Oxo mum and as a Loose Women presenter, had spoken of her plans to spend one more Christmas with her family just days before she lost her battle with cancer.
She was diagnosed last July but in late September disclosed that she had decided to end her treatment to limit the amount of suffering her family would witness.
She died in her husband's arms at a London hospital on October 19.
Her book, 'There's Something I've Been Dying To Tell You', discusses her illness in detail and has spent weeks at the top of the best-seller lists.
Lynda Bellingham (1948-2014)
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Lynda Bellingham (credit:Rex Features)
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Lynda Bellingham (credit:Rex Features)
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Lynda Bellingham (credit:Rex Features)
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Lynda Bellingham (credit:Rex Features)
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Lynda Bellingham (credit:Rex Features)
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Lynda Bellingham (credit:Rex Features)
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Lynda Bellingham (credit:Rex Features)
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Lynda Bellingham (credit:Rex Features)
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Lynda Bellingham (credit:Rex Features)
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Lynda Bellingham (credit:Rex Features)
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Lynda Bellingham (credit:Rex Features)
Entertainment - Lynda Bellingham(12 of64)
Actress Lynda Bellingham with sons Michael and Robbie Peluzo. (credit:Duncan Raban/EMPICS Entertainment)
Entertainment - Lynda Bellingham(13 of64)
English actress Lynda Bellingham. (credit:Duncan Raban/EMPICS Entertainment)
Television - Lynda Bellingham Photocall(14 of64)
Lynda Bellingham, English actress (credit:Robin Kennedy/EMPICS Entertainment)
Television - Within These Walls Photocall - London(15 of64)
Stars of ITV drama 'Within These Walls', Floella Benjamin (l) and Lynda Bellingham (credit:Chris Lawrence/EMPICS Entertainment)
Entertainment - Lynda Bellingham(16 of64)
English actress Lynda Bellingham. (credit:All Action/EMPICS Entertainment)
Theatre - Lynda Bellingham(17 of64)
Actress Lynda Bellingham who is starring in the production of 'Sisters Rosensweig'. (credit:Jez Self/EMPICS Entertainment)
Television - 'Faith in the Future' Photocall - London(18 of64)
Lynda Bellingham with Julia Sawalha who star in the ITV sitcom 'Faith in the Future'. (credit:Jez Self/EMPICS Entertainment)
TV actress Lynda Bellingham on the catwalk during a fund raiser to benefit the Eating Disorder Assocition and the European Anore...(19 of64)
TV actress Lynda Bellingham on the catwalk during a fund raiser to benefit the Eating Disorder Assocition and the European Anorexia Trust which took place at the Banqueting House, Whitehall, London. (credit:STEFAN ROUSSEAU/PA Archive)
PA NEWS PHOTO 16/3/98 LYNDA BELLINGHAM PRESENTS THE HUNTERS & FRANKAU BEST BRASSERIE AWARD TO "LANGAN'S BRASSERIE" AT THE CARLT...(20 of64)
PA NEWS PHOTO 16/3/98 LYNDA BELLINGHAM PRESENTS THE HUNTERS & FRANKAU BEST BRASSERIE AWARD TO "LANGAN'S BRASSERIE" AT THE CARLTON LONDON RESTAURANT AWARDS 1998 THIS EVENING (MONDAY). PHOTO BY SEAN DEMPSEY/E.D.I. (credit:SEAN DEMPSEY/PA Archive)
Parentalk Cartoon(21 of64)
(L-R) Actress Lynda Bellingham, Director of Parentalk Steve Chalke, singer Sheila Ferguson of the Three Degrees and TV journalist Huw Edwards present a cartoon by artist John Byrne, at No10 Downing Street to celebrate the birth of the Blairs son Leo. * 26/5/00 is designated National Parentalk Day by the organisation, which encourages parents to talk with their children. (credit:Ian Nicholson/PA Archive)
celeb xmas concert(22 of64)
Lynda Bellingham at the Celebrity Christmas concert for autism at St Paul Church in London.Claude Haller/allactiondigital.com (credit:Claude Haller)
tv quick 2(23 of64)
Lynda Bellingham attending the 2004 TV Quick Awards at the Dorchester Hotel in London.Doug Peters/allactiondigital.com (credit:Doug Peters)
ROYAL ITV(24 of64)
Britain's Queen Elizabeth II chats to guests at the ITV 50th Anniversary celebration, including (r - l) Nicholas Parsons, Lynda Bellingham and Harry Hill, Thursday October 13, 2005. The Queen and the Duke of Edinburgh mingled with the actors and presenters at the black tie reception, chatting to guests including Patsy Kensit, Frank Skinner, David Baddiel and Sam Aston, who plays Chesney in Coronation Street. See PA story ROYAL ITV. PRESS ASSOCIATION Photo. Photo credit should read: Chris Young/PA/WPA Rota. (credit:Chris Young/PA Archive)
Sir Paul McCartney visits his Fame School(25 of64)
Former Beatle Sir Paul McCartney goes to kiss Lynda Bellingham during a visit to his Fame School in Liverpool yesterday, where he was seen not wearing a wedding ring. (credit:Owen Humphreys/PA Archive)
Sir Paul McCartney visits his Fame School(26 of64)
Former Beatle Sir Paul McCartney stands with Lynda Bellingham during a visit to his Fame School in Liverpool yesterday. (credit:Owen Humphreys/PA Archive)
RTS Programme Awards - London(27 of64)
Denise Welch, Sherree Hewson and Lynda Bellingham arriving at the Royal Television Society Awards 2008, the Grosvenor House Hotel, London. (credit:Doug Peters/Doug Peters)
RTS Programme Awards - London(28 of64)
Lynda Bellingham arriving at the Royal Television Society Awards 2008, the Grosvenor House Hotel, London. (credit:Doug Peters/Doug Peters)
Strictly Come Dancing contestants revealed(29 of64)
Laila Rouass, Natalie Cassidy, Lynda Bellingham and Zoe Lucker at the Bloomsbury Ballroom in London, where the latest celebrities who will be performing in this years Strictly Come Dancing were announced, on Monday August 24, 2009. (credit:Brian O'Sullivan/EMPICS Entertainment)
National Television Awards 2010 - Show - London(30 of64)
Presenters from Loose Women - Carol McGiffin, Lynda Bellingham, Denise Welch, Kate Thornton, Leslie Garrett and Andrea McLean during the National Television Awards 2010, at the 02 Arena, London. (credit:Ian West/PA Archive)
Barnado's reception(31 of64)
The Duchess of Cornwall talks with Lynda Bellingham during a reception for supporters of the children's charity Barnardo's at Clarence House, London. (credit:Ian Nicholson/PA Archive)
BAFTA Awards 2002 Arrivals(32 of64)
LONDON - APRIL 21: Actress Linda Bellingham arrives at the BAFTA'S 2002 in Drury Lane on April 21st, 2002 in London. (Photo by Dave Benett/Getty Images) (credit:Dave Benett via Getty Images)
The UK Premiere Party for "The Importance of Being Ernest"(33 of64)
LONDON - SEPTEMBER 5: Linda Bellingham attends the UK Premiere Party for 'The Importance of Being Ernest' at The Savoy Hotel on September 5, 2002 in London. (Photo by Dave Benett/Getty Images) (credit:Dave Benett via Getty Images)
Opening Night Party for 'Lady Windermere's Fan' In London(34 of64)
LONDON: FEBRUARY 21: Actors, Jack Davenport and Linda Bellingham at the opening night party for 'Lady Windermere's Fan' held at the Trafalgar Hotel on 21st February 2002, in London. (Photo by Dave Benett/Getty Images). (credit:Dave Benett via Getty Images)
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LONDON - DECEMBER 11: British actress Linda Bellingham and her two sons arrive at the premiere party for the film 'Lord of the Rings: The Fellowship of the Ring' at Tobacco Dock on December 11, 2001 in London. (Photo by Dave Hogan/Getty Images) (credit:Dave Hogan via Getty Images)
2001 British Comedy Awards(36 of64)
UNITED KINGDOM - DECEMBER 16: Linda Bellingham & Loretta Swit, The 2001 British Comedy Awards, At Lwt Studio's, London (Photo by Dave Benett/Getty Images) (credit:Dave Benett via Getty Images)
The Importance Of Being Ernest(37 of64)
UNITED KINGDOM - SEPTEMBER 05: Nicholas Grace And Linda Bellingham, 'The Importance Of Being Ernest' Movie Premiere At Odeon West End And The Party At The Savoy, London (Photo by Dave Benett/Getty Images) (credit:Dave Benett via Getty Images)
Harpers and Moet Restaurant Awards(38 of64)
LONDON - NOVEMBER 4: Linda Bellingham attends the Harpers and Moet Restaurant Awards at Claridges Hotel on November 4, 2003 in London. (Photo by Dave Benett/Getty Images) (credit:Dave Benett via Getty Images)
Celebrity Christmas Concert for Autism(39 of64)
Dame Diana Rigg, Robert Bathurst, Zoe Wanamaker Stephen Fry, Jane Asher and Linda Bellingham (Photo by Ferdaus Shamim/WireImage) (credit:Ferdaus Shamim via Getty Images)
The Royal Television Society Awards 2004 in London(40 of64)
LONDON - MARCH 16: Actress Linda Bellingham at The Royal Television Society Awards 2004 held at The Grosvenor House Hotel on 16th March 2004, in London. (Photo by Dave Benett/Getty Images). (credit:Dave Benett via Getty Images)
ITV's Hells Kitchen - Arrivals(41 of64)
Julia Sawalha, Amanda Redman, Linda Bellingham and Sylvia Simms (Photo by Ferdaus Shamim/WireImage) (credit:Ferdaus Shamim via Getty Images)
The Royal Television Society Awards 2004 in London(42 of64)
LONDON - MARCH 16: Actress Linda Bellingham and guests at The Royal Television Society Awards 2004 held at The Grosvenor House Hotel on 16th March 2004, in London. (Photo by Dave Benett/Getty Images). (credit:Dave Benett via Getty Images)
TV Quick Awards 2004 - Arrivals(43 of64)
LONDON - SEPTEMBER 6: Actress Linda Bellingham arrives at the 'TV Quick Awards 2004 ' at The Dorchester on September 6, 2004 in London. The annual awards acknowledge the most popular TV programmes and stars in 15 separate categories. (Photo by Dave Hogan/Getty Images) (credit:Dave Hogan via Getty Images)
2004 TV Quick Soap Awards - Arrivals(44 of64)
Linda Bellingham during 2004 TV Quick Soap Awards - Arrivals at Dorchester Hotel in London, Great Britain. (Photo by Jon Furniss/WireImage) (credit:Jon Furniss via Getty Images)
BAFTA Television Craft Awards - Red Carpet Arrivals(45 of64)
LONDON, UNITED KINGDOM - APRIL 27: Linda Bellingham attends the BAFTA Television Craft Awards at The Brewery on April 27, 2014 in London, England. (Photo by Eamonn McCormack/WireImage) (credit:Eamonn McCormack via Getty Images)
"The Full Monty" - Press Night - Curtain Call & Backstage(46 of64)
LONDON, ENGLAND - FEBRUARY 25: (L-R) Daniel Evans, Kenny Doughty, Jack Hollington and Linda Bellingham attends the press night performance of 'The Full Monty' at the Noel Coward Theatre on February 25, 2014 in London, England. (Photo by David M. Benett/Getty Images) (credit:David M. Benett via Getty Images)
"The Full Monty" - Press Night - Curtain Call & Backstage(47 of64)
LONDON, ENGLAND - FEBRUARY 25: (L-R) Daniel Evans, Kenny Doughty, Jack Hollington and Linda Bellingham attends the press night performance of 'The Full Monty' at the Noel Coward Theatre on February 25, 2014 in London, England. (Photo by David M. Benett/Getty Images) (credit:David M. Benett via Getty Images)
Celebrity Sightings In London - July 06, 2010(48 of64)
LONDON, UNITED KINGDOM - JULY 06: Linda Bellingham is seen leaving GMTV studios on July 6, 2010 in London, England. (Photo by David Thompson/FilmMagic) (credit:David Thompson via Getty Images)
Lynda Bellingham Launches Autumn/Winter 2011 Collection For www.isme.com(49 of64)
LONDON, ENGLAND - JUNE 01: Linda Bellingham attends the launch of www.isme.com's autumn/winter 2011 collection at Kettners on June 1, 2011 in London, England. (Photo by Ferdaus Shamim/WireImage) (credit:Ferdaus Shamim via Getty Images)
Philips British Academy Television Awards (BAFTA) - Winners Boards(50 of64)
LONDON, ENGLAND - JUNE 06: Linda Bellingham poses in front of the winners boards at The Philips British Academy Television Awards held at The Palladium on June 6, 2010 in London, England. (Photo by Dave Hogan/Getty Images) (credit:Dave Hogan via Getty Images)
Celebrity Sightings In London - July 06, 2010(51 of64)
LONDON, UNITED KINGDOM - JULY 06: (L-R) Andrea McLean, Penny Smith and Linda Bellingham are seen leaving GMTV studios today on July 6, 2010 in London, England. (Photo by David Thompson/FilmMagic) (credit:David Thompson via Getty Images)
Philips British Academy Television Awards (BAFTA) - Party Inside Arrivals(52 of64)
LONDON, ENGLAND - JUNE 06: (UK TABLOID NEWSPAPERS OUT) Linda Bellingham arrives at at The Philips British Academy Television Awards After Party held at The Natural History Museum on June 6, 2010 in London, England. (Photo by Fergus McDonald/Getty Images) (credit:Fergus McDonald via Getty Images)
The Red Room Opening Party - Inside(53 of64)
LONDON, ENGLAND - NOVEMBER 02: (EMBARGOED FOR PUBLICATION IN UK TABLOID NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME. MANDATORY CREDIT PHOTO BY DAVE M. BENETT/GETTY IMAGES REQUIRED) Linda Bellingham attends the opening party of The Red Room, on November 2, 2009 in London, England. (Photo by Dave M. Benett/Getty Images) (credit:Dave M. Benett via Getty Images)
Lynda Bellingham passes away(54 of64)
Lynda Bellingham (credit:Rex Features)
Lynda Bellingham passes away(55 of64)
Lynda Bellingham (credit:Rex Features)
ROYAL Investitures(56 of64)
Miss Lynda Bellingham from London is made an OBE (Officer of the Order of the British Empire) by the Prince of Wales at Buckingham Palace. PRESS ASSOCIATION Photo. Picture date: Friday March 14, 2014. Photo credit should read: Yui Mok/PA Wire (credit:Yui Mok/PA Archive)
ITV Daytime Christmas Party - Arrivals(57 of64)
LONDON, UNITED KINGDOM - DECEMBER 14: Linda Bellingham attends the ITV Daytime Christmas Party on December 14, 2009 in London, England. (Photo by Stuart Wilson/Getty Images) (credit:Stuart Wilson via Getty Images)
Investitures at Buckingham Palace(58 of64)
Actress Lynda Bellingham holding her OBE (Officer of the Order of the British Empire) after she received it from the Prince of Wales at an Investiture Ceremony at Buckingham Palace in central London. (credit:John Stillwell/PA Archive)
Investitures at Buckingham Palace(59 of64)
Actress Lynda Bellingham holding her OBE (Officer of the Order of the British Empire) with husband Michael, after she received it from the Prince of Wales at an Investiture Ceremony at Buckingham Palace in central London. (credit:John Stillwell/PA Archive)
Investitures at Buckingham Palace(60 of64)
Actress Lynda Bellingham with (left to right) sons Michael and Robert, husband Michael and step-son Bradley arrive at Buckingham Palace in central London for an Investiture Ceremony where she will receive an OBE (Officer of the Order of the British Empire). (credit:John Stillwell/PA Archive)
Lynda Bellingham passes away(61 of64)
Lynda Bellingham (credit:Rex Features)
Lynda Bellingham passes away(62 of64)
Lynda Bellingham (credit:Rex Features)
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Lynda Bellingham (credit:Rex Features)
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Lynda Bellingham (credit:Rex Features)