Symptomatic Tarlov cyst and electroacupuncture: more studies required

<正>1 Introduction Tarlov cysts,which develop between the endoneurium and perineurium,are perineural cysts that are defi ned a cerebrospinal f luid(CSF)-f illed saccular lesions commonl located in the extradural space of the sacral spinal canal[1]They are rare,showing up in 1.5%to 4.6%of patient receiving magnetic resonance imaging(MRI)for thei lumbosacral symptoms,and only 1%or less of Tarlo cysts are considered to be symptomatic[2,3].