The life of celebrity journalist Piers Morgan might have been saved by an astute television viewer.
The viewer, Gillian Nuttall, contacted him after noticing something about his appearance during a broadcast interview, the Daily Mail reports.
Nuttall, the founder of an organization called Melanoma UK, was concerned about a blemish she saw on Morgan's chest while watching his British documentary series about serial killers.
After viewing the episode in November, Gillian wrote on social media: "He was interviewing a serial killer and I watched it -- he had an open neck shirt on and it caught my eye. I stopped the TV and looked closely -- it really bothered me so as I'd got his email, just thought 'quick shove in the right direction won't harm.'"
She humorously added: "I haven't got a Piers Morgan fetish, honestly!"
Her email said: "Piers, at the risk of sounding like a lunatic, I'm just watching your program and there's a blemish on your chest. Have you had it checked?"
He took her advice and had a specialist examine it.
"This week, a top dermatologist took one look and immediately cut it out," Morgan announced. "Much further delay, he informed me, and it might well have turned cancerous. Give that lady a gold star."
"Thanks, Gillian," he continued. "Oh the irony of a serial killer inadvertently helping to save my life. Merry Christmas!"
According to the Melanoma UK website, the organization strives to "provide the best support, guidance, and treatment advice that we possibly can" for patients who have the disease.
As Melanoma UK explains, malignant melanoma is when cancer cells form in the skin.
When caught early, 80-90 percent of melanomas can be removed with no recurrence. But if it's not caught early, it can spread to other parts of the body, which severely impacts the prognosis.
As in Morgan's case, warning signs include any other unusual skin issue, especially moles that have changed their appearance or become painful or itchy.
It is not reported which episode of Morgan's "Serial Killer" series that Nuttall noticed his unusual blemish.
The interview with convicted killer Mark Riebe was particularly confrontational.
Riebe, who is currently serving life in a Florida prison for the 1988 murder of pregnant mother Donna Callahan, abruptly ended the interview and stormed off the set.
"We're done," he said angrily. "I answered your questions."
Morgan told The Mirror he gets "very involved" in the cases, which involves meeting the killer's family.
"You go into the scene of where it happened, and you engage with families ... it consumes you."