A woman in the US prompted a medical emergency when her poo developed an unsual silver hue.
The 69-year-old Washington DC native ended up in a medical journal report after being rushed to the MedStar Georgetown University Hospital.
New England Journal of Medicine report the woman had been suffering from cancer at the time as well as ongoing dizziness.
In a case report doctors said the lady had an “unusually coloured stool” and pictures showed a strangely metallic looking sample displayed in a plastic cup.
They determined the cause was the result of jaundice combined with a side effect from medication she was taking.
Further tests of poo samples and scans revealed poo was present and the cancer had sadly spread from her colon to her liver.
Medics also uncovered colorectal tumour and due to her advanced stage decided she would be best off with hospice care, The Mirror report.
The team wrote: “After a discussion of treatment options with the patient, a decision was made to focus on her comfort.”
While faeces comes in a range of colours, you should speak to your doctor if you stool is red or black.
Dr Michael F. Picco, a doctor with the Mayo Clinic, explained: “Stool colour is generally influenced by what you eat as well as by the amount of bile — a yellow-green fluid that digests fats — in your stool. As bile pigments travel through your gastrointestinal tract, they are chemically altered by enzymes, changing the pigments from green to brown.
“Consult your doctor if you’re concerned about your stool color. If your stool is bright red or black — which may indicate the presence of blood — seek prompt medical attention.”