An Australian man who attempted to smuggle marijuana into prison by hiding it in a balloon up his nose has removed the drugs more than 18 years later, after believing he had swallowed it.
His doctors reported the case in a paper published in the British Medical Journal. Dr. Murray Smith wrote that the patient was first given the cannabis inside a rubber balloon when his girlfriend visited him in prison. The man inserted the balloon into his right nostril to hide it from the prison guards. However, he was unable to retrieve it once he returned to his cell. He believed that he had accidentally swallowed it.
Over the next 18 years, the balloon developed into a stone in the nasal cavity formed as calcium and magnesium salts slowly built up around the rubber. The man had regular sinus infections and frequent complaints about nasal obstructions. He eventually sought treatment after getting bad headaches.