3. Unusual bodily waste
Another symptom of pancreatic cancer is dark brown urine and gray, greasy stools. Both are additional symptoms of jaundice caused by a tumor blocking bile production in the pancreas.
Bilirubin is the substance that typically gives feces its brown color, but when production is impacted by a tumor, it stays in the blood instead of passing out through the bowels.
As bilirubin levels in the blood increase, it comes out in urine instead, making pee a dark brown color. Poop that lacks bilirubin, on the other hand, becomes gray.
Dark urine can also be caused by dehydration, and changes in the color of fecal matter have a lot to do with what you’ve eaten recently. But if you notice dark pee and gray poop on a regular basis, it is a strong warning sign.