A man had cannabis stuffed up his nose for 18 years - and he never realised it.
His initial intention with the cannabis was to smuggle it into prison using a balloon that he planned to hide up his nose.
However, the man mistakenly thought he had swallowed the package - meaning it has remained inside his nose for almost two decades.
And in spite of witnessing a spike in the number of sinus infections he was suffering, the prisoner never thought any more about the issue until a recent check-up.
The peculiar story has been documented in the British Medical Journal, which describes the case as "unique".