Unusual Appearance of Lumbar Facet Synovial Cyst and Differential Diagnosis

Demir, Mustafa Kemal

doi:10.1148/radiol.2451061834

Cited by 1 publication

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“…2,4,12,19,27) The differential diagnosis of synovial cyst in the lumbar spine includes migrated herniated disk, schwannoma, cystic neurofibroma, extradural arachnoid cyst, perineural cyst, meningioma, ganglion cyst, and ligamentum flavum cyst, among others. 3,7,12,17,27) In the present case, we could not definitely confirm that synovial cyst was the causative pathology based only on the findings of MR imaging and CT. CT showed a small amount of gas in the mass. Gas-filled synovial cysts have been reported, presumably originating from the contiguous vacuum in the facet joint, 1,10,11,15,18,24,25) but the diagnostic value is limited due to the polymorphism of radiologic presentation of synovial cysts and lack of sensitivity of CT. 21) Surgery has been considered for the treatment of symptomatic lumbar synovial cyst.…”

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confidence: 67%

Intradural Invasion of Lumbar Synovial Cyst

Bae

Lee

Kim

et al. 2012

Neurol. Med. Chir.(Tokyo)

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A 63-year-old female presented with a rare case of synovial cyst invading the dura mater and mimicking an intradural extramedullary tumor in the lumbar spine. She underwent posterior lumbar fusion with laminar wire fixation from L3 to S1 levels. She complained of severe pain along the anterolateral thigh in both legs for 1 year. Radiological examinations, including magnetic resonance imaging and computed tomography revealed an intradural extramedullary lesion at the L2-3 level that was compressing the thecal sac. Histological examination confirmed a synovial cyst. Synovial cyst should be considered in the differential diagnosis of an intradural extramedullary mass causing lumbar radiculopathy.

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