Table 3.

Comparative data analysis of previous series reported in literature

Author	Number of cases/mean age (years)	Myelopathy	Radiculopathy	Standard laminectomy/laminoplasty	Minimally invasive approach	Focus
Rahimizadeh A et al., 2013	4/39	2	2	4	0	All four cyst were in thoracic region
Funao H et al., 2012	12/39.7 6±3.5	6 patient had BBD	-	7	5	Patients with long duration of symptoms had poor outcome; significant difference in postoperative kyphosis between patients treated with standard laminectomy and minimally invasive approach
Liu JK et al., 2005	1/11	1	0	1	0	No dural defect or fistulous connection
Choi et al., 2013[3]	2/55	0	2	2	1	In one case, only cyst fenestration was done due to moderate bleeding while dissection
Woo JB et al., 2016	2/55.5	0	2	2	0
Kong et al., 2013[7]	1/65	0	1	1	0	History of trauma present
Netra R et al., 2011	18/34.6	-	-	-	-	Nabors types I and II meningeal cysts; One case had a previous history of trauma
Quillo-Olvera et al., 2017[8]	1/67	1	0	0	1	-
Tokmak M et al., 2015	10/50	5	4	10	0	n=1 cyst was anterolateral; n=6 total excision was done
Muthukumar 2001[9]	1/25	0	1	1	0	Sacral EDAC; should be included in differential diagnosis of sacral meningocoele
Kulkarni et al., 2004[2]	7/17.5	7 had paraparesis, 1 had urinary incontinence	1	7	0	Radical resection of the walls leads to a lasting cure from extradural arachnoid cyst

BBD - Bowel bladder dysfunction; EDAC - Extradural arachnoid cyst