A case of unilateral Horner's syndrome diagnosed in retrospect following epidural analgesia during labour and caesarean section.

Horner's syndrome is a rare complication of epidural analgesia in labour. Although it is a sign of high sympathetic block, patients are usually haemodynamicaly stable. We report a case of undiagnosed Horner's syndrome complicating epidural analgesia in labour, where a standard dose of local anaesthetic was given for an emergency caesarean section without problems. This may confirm the benign nature of the syndrome.