TABLE 1:

Clinical summary of patients

Patient/Age (y)/Sex	Cognard Classification	Affected Sinus	Symptom		Treatment^*
Patient/Age (y)/Sex	Cognard Classification	Affected Sinus	Description	Due to Venous Hypertension?	Treatment^*
1/75/M	I	R sigmoid	Tinnitus	No	TAE
2/54/M	I	Superior sagittal sinus	Bulging scalp vessels	No	TAE
3/78/F	I	Superior sagittal sinus	Aneurysm-like STA dilatation	No	None
4/54/F	I	L cavernous	None	NA	None
5/58/M	I	R cavernous	Chemosis, diplopia	No	None
6/73/M	I	L cavernous	Diplopia	No	None
7/75/F	I	L cavernous	Chemosis	No	TVE
8/62/M	IIa	L sigmoid	Tinnitus	No	TAE, TVE
9/75/M	IIa	R transverse sigmoid	None	NA	None
10/33/M	IIb	L transverse sigmoid	Headache, tinnitus	Yes	TAE, TVE
11/66/F	IIb	L cavernous	Diplopia, disorientation	Yes	TVE
12/85/F	IIb	L cavernous	Chemosis, diplopia	No	TAE
13/33/F	IIa+b	R transverse sigmoid	Headache, visual disturbance	Yes	TAE
14/54/F	IIa+b	L transverse sigmoid	Dementia	Yes	TAE,TVE
15/55/M	III	L transverse sigmoid	Hemorrhage, vertigo, convulsion	Yes	TAE, TVE
16/63/M	III	R transverse sigmoid	Hemorrhage	Yes	TAE
17/67/M	III	R transverse confluence	L lower quadrant homonymous anopsia	Yes	TAE, TVE
18/72/F	III	L transverse confluence	Dementia	Yes	TVE
19/78/F	III	L transverse	Convulsion, disturbed consciousness	Yes	TAE
20/67/M	IV	L anterior fossa	Convulsion	Yes	Surgery
21/74/M	IV	R anterior fossa	None	NA	Surgery

Note.—NA = Not applicable, STA = superficial temporal artery, TAE = transarterial embolization, TAV = transvenous embolization.
* All patients improved except for patients 3 and 12, whose condition was unchanged.