‘US immigration officials insisted the sufferer of an anal infection remove a small piece of medical thread which was being used by doctors to treat the condition. The man required treatment under general anaesthetic as a result.
The man had an anal fistula, which is a painful channel that can develop deep into the anus, caused by infection or digestive conditions such as Crohn’s disease. [..]
The seton was made of a blue braided medical suture material knotted and passed into the hole where the fistula surfaced. After one baffled immigration officer pulled “very hard” on the seton, the patient was given the choice by the baffled immigration officers of either getting on the next plane home, or submitting himself to a procedure to have it removed. [..]
The seton was duly removed by an airport doctor, who claimed to have no idea what it was. The man now requires treatment under general anaesthetic to have a replacement inserted.’