Spinal arachnoid cysts – our experience and review of literature

Abstract

Formation and expansion of SAC is not completely understood. Myelography, CT myelography and cinematic MRI can demonstrate the location of the communication site between the spinal subarachnoid space and the cyst cavity. The usual management of SAC is excision of the cyst with closure of the dural defect in extradural cysts, while in case of intradural cysts, especially the ones located anterior to the cord, fenestration of the cyst is usually performed.

Spinal extradural arachnoid cyst: Rare cases from Indian Institutes

“…According to Nabors classification,[ 3 ] spinal arachnoid cysts are of three types. Extradural cysts (SEDAC); without and with involvement of nerve root are Type I and Type II cysts, respectively.…”

Arachnoid diverticulum diagnosis following treatment of cryptococcal meningitis in a dog

“…Patients in this study similarly underwent 3–5 lumbar punctures, and it was theorized that inflammation, both during infection and postinfection, created the environment to allow adhesions to form in the subarachnoid space. Other reviews of human literature point to trauma or surgery (as well as inflammation) as the inciting cause for development . However, there is little to no evidence and only vague references to anecdotes regarding lumbar or cisternal taps causing arachnoid diverticula.…”

Large Cerebral Arachnoid Cyst

“…Spinal arachnoid cysts are generally misdiagnosed, because symptoms are often nonspecific. Often, the cysts are an incidental finding on MRI 1,9 .…”