Insufficient Labor Epidural Analgesia Due to Asymptomatic Sacral Perineural Cyst: A Case Report.

Lumbar epidural anesthesia is widely used for labor epidural analgesia (LEA), but it often results in insufficient analgesia in the sacral region. We report a case where we performed LEA using lumbar epidural anesthesia, and an asymptomatic sacral perineural cyst was considered the potential cause of inadequate analgesia in the sacral region. A 33-year-old primigravida was admitted with premature rupture of membranes.