TABLE 1:

Summary of patients with an arachnoid cyst

Patient/Age (y)/Sex	Location of Arachnoid Cyst	Clinical Findings	Confirmation Method	Communication with CSF^*
Patient/Age (y)/Sex	Location of Arachnoid Cyst	Clinical Findings	Confirmation Method	PC Cine MR Imaging	CTC	Surgery
1/8/M	L middle fossa	Seizure	CTC	Yes	Yes	NA
2/53/F	R middle fossa	Headache	CTC	Yes	Yes	NA
3/27/M	L middle fossa	Incidental	CTC	Yes	Yes	NA
4/14/M	L middle fossa	Headache	CTC	Yes	Yes	NA
5/16/M	L middle fossa	Headache	CTC	Yes	Yes	NA
6/26/F	L middle fossa	Headache	CTC	Yes	Yes	NA
7/15/M	R middle fossa	Headache	CTC	Yes	Yes	NA
8/49/M	R cerebellopontine angle	Vertigo	CTC	Yes	Yes	NA
9/66/F	L middle fossa	Headache	CTC	Yes	Yes	NA
10/20/M	L middle fossa	Headache	CTC	Yes	Yes	NA
11/22/M	R middle fossa	Headache	CTC	Yes	Yes	NA
12/50/F	L middle fossa	Headache	CTC	Yes	Yes	NA
13/10/F	R middle fossa	Headache	CTC	No	Yes	NA
14/42/M	L middle fossa	Incidental	CTC	No	Yes	NA
15/37/F	Quadrigeminal cistern	Headache	CTC	No	Yes	NA
16/52/F	Cerebral convexity	Headache	CTC	No	No	NA
17/70/M	Quadrigeminal cistern	Incidental	CTC	No	No	NA
18/11/M	L cerebellopontine angle	Headache	CTC	No	No	NA
19/15/F	Cerebral convexity	Headache	CTC	No	No	NA
20/33/M	Quadrigeminal cistern	Headache	CTC	No	No	NA
21/82/M	L middle fossa	Incidental	CTC	No	No	NA
22/5/M	Cerebral convexity	Seizure	CTC	No	No	NA
23/38/M	L middle fossa	Headache	CTC	No	No	NA
24/33/M	Cerebral convexity	Disarticulation	CTC	No	No	NA
25/12/M	Cerebral convexity	Headache	CTC	No	No	NA
26/34/F	R cerebellopontine angle	Vertigo	Surgery	No	NA	No
27/22/F	Retrocerebellar cistern	Vertigo	Surgery	No	NA	No
28/1/M	Retrocerebellar cistern	Cardiomegaly	Surgery	No	NA	No
29/1/F	Retrocerebellar cistern	Developmental delay	Surgery	No	NA	No
30/21/F	Quadrigeminal cistern	Visual loss	Surgery	No	NA	No
31/10/M	Retrocerebellar cistern	Headache, nausea/vomiting	Surgery	No	NA	No
32/4/M	Retrocerebellar cistern	Ataxia	Surgery	No	NA	No
33/17/M	L middle fossa	Seizure	CTC, surgery	No	No	No
34/1/M	L middle fossa	Tendency to sleep	CTC, surgery	No	No	No
35/3/M	R middle fossa	Seizure	CTC, surgery	No	No	No
36/4/M	L middle fossa	Ataxia	CTC, surgery	No	No	No
37/40/F	Quadrigeminal cistern	Headache, Nausea/vomiting	CTC, surgery	No	No	No
38/11/M	L middle fossa	Temporal bulging	CTC, surgery	No	No	No
39/18/F	Quadrigeminal cistern	Headache	CTC, surgery	No	No	No

* NA indicates not applicable.