The Aword

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Complications include: Subarachnoid cysts: These are a recognised complication of arachnoiditis, in particular that caused by myelographic dyes or epidural anaesthesia. ([i])

They tend to be more common in the thoracic region than cervical or lumbar. In symptomatic cases, clinical presentation is generally non-specific, although there may be a sensory level, unlike in uncomplicated arachnoiditis.

Surgical excision or drainage is often successful, provided that there is early intervention.                                            

[i] Torres D, Bauso Toselli L, Vecchi E, Leiguarda R, Doctorovich D, Merello M, Guevara J, Nogues M Medecina (B Aires) 1993;53(50):391-396 [Spinal arachnoiditis as a complication of peridural anesthesia]

Sklar EM, Quencer RM, Green BA, Montalvo BM, Post MJ Radiology 1991 Nov;18(2):549-554 Complications of epidural anesthesia: MR appearances of abnormalities

Nogues MA, Merello M, Leiguarda R, Guevara J, Figari A Eur Neurol 1992;32(2):99-101 Subarachnoid and intramedullary cysts secondary to epidural anesthesia for gynecological surgery


Tseng SH, Lin SM Clin Neurol Neurosurg 1997 Dec; 99(4): 256-8 Surgical treatment of thoracic arachnoiditis with multiple subarachnoid cysts caused by epidural anesthesia.