Lumbar discal cyst and post-operative discal pseudocyst: a case series.

Four cases of lumbar cyst (2 discal cysts and 2 post-operative discal pseudocysts) who presented predominantly with features of sciatica without any motor, sensory or sphincteric disturbances. The patients were treated conservatively, and the management was aimed to avert any untoward surgical intervention taking into consideration patient safety and care. Two had previous lumbar decompressive discectomy. During the mean follow-up period of 13 months, there was progressive recovery of symptoms in all our 4 patients. All our patients were successfully managed by conservative approach. An intervertebral disc cyst should be considered in young patients in the differential diagnosis of any extradural intraspinal mass ventral to the thecal sac, notwithstanding its rarity. Alongside, conservative management can be offered as first line of management with appropriate patient selection that is absence of any motor/sensory/sphincteric disturbances. Facetal micro-instability could be one of the aetiologies of this pathology which necessitates further study.