Television presenter Michaela Strachan has revealed she was diagnosed with breast cancer.
The Springwatch host said she was forced to have both breasts removed after the disease was discovered in a mammogram at the start of the year.
"The tears started to roll as my doctor tried to tell me what would happen next, but I only took in every fifth word or so," she told the Mail on Sunday's You magazine.
"The one word that registered was cancer."
Medics then advised her to have a double mastectomy.
The star said: "I couldn't get my head around the fact that on Monday morning I'd been apparently healthy, but by Tuesday I had cancer and by Wednesday I was talking about a double mastectomy."
The 48-year-old, who is set to undergo reconstructive surgery, stressed that her experience showed the importance of regular check-ups.
"If I'd put mine off, my story could have been a very different one," she said.
Last year, actress Angelina Jolie revealed to the world she had undergone a double mastectomy to prevent her getting breast cancer. She took the decision after testing positive for the BRCA1 gene mutation that greatly increases the risk of developing the disease.
Referrals to UK breast cancer clinics have more than doubled since Jolie's announcement.
Michaela said she thought hard about telling her story, "because I don't want to be labelled".
"For years I've carried the label ex-anorexic," she added. "No doubt that will now change to breast cancer patient.
"But we all have challenges to face in our lives. We all have curveballs thrown at us.
The presenter's TV career started in 1986 when she fronted the children's Saturday morning show The Wide Awake Club with Timmy Mallett.
Since then, she has presented The Hitman and Her alongside Pete Waterman, children's wildlife programme The Really Wild Show and Countryfile.
She now presents Autumnwatch, Winterwatch and Springwatch with Chris Packham and Martin Hughes-Games.