Doctor says certain type of poo is a ‘highly concerning’ red flag for ca.n.cer

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“This tends to occur if tumours are present near the end of the colon or if they line the entire inside of the colon, which narrows whatever stool passes through.”

Cecchini – who is also co-director of the colorectal program at the Center for Gastrointestinal Cancers – went on to emphasise: “When it exists, it is highly concerning.”

These types of stools could be an indicator that the colon is narrowing or has a blockage – both of which could be caused by the presence of ca.nc.er in the body.