Relationship between venous drainage subtypes and sub-arachnoid hemorrhage subtypes: a meta-analysis.
To investigate whether associations exist between venous drainage subtypes (types I, II, and III) and the risk of subarachnoid hemorrhage subtypes.



Published case-control and case series from 2010 to 2014 which met all the inclusion criteria for the meta-analysis were selected and subjected to rigorous statistical analysis.



A total of 11 studies with an overall patient population (case and controls) of 891 were involved in the study. Types I and II venous drainage had odds against peri-mesencephalic subarachnoid hemorrhage. The odds were in favor of type III venous drainage and peri-mesencephalic sub-arachnoid hemorrhage and idiopathic sub-arachnoid hemorrhage (ISAH).



Type I deep venous drainage may not be associated with the risks of peri-mesencephalic subarachnoid hemorrhage and ISAH, however, types II and III may be associated with high risk of peri-mesencephalic subarachnoid hemorrhage and ISAH, respectively.
Department of Neurosurgery, Cerebral Vascular Disease Research Center, The Second Affiliated Hospital of Anhui Medical University, Anhui Medical University, 678 Fu Rong Road, Hefei, Anhui Province, China.|Anhui Medical University, Hefei, 230601, Anhui, China.
Chandra Prakash
CP
Yadav
Department of Neurosurgery, Cerebral Vascular Disease Research Center, The Second Affiliated Hospital of Anhui Medical University, Anhui Medical University, 678 Fu Rong Road, Hefei, Anhui Province, China.|Anhui Medical University, Hefei, 230601, Anhui, China.
Jie
J
Shen
Department of Neurosurgery, Cerebral Vascular Disease Research Center, The Second Affiliated Hospital of Anhui Medical University, Anhui Medical University, 678 Fu Rong Road, Hefei, Anhui Province, China.|Anhui Medical University, Hefei, 230601, Anhui, China.
Mohan
M
Karki
Department of Neurosurgery, Cerebral Vascular Disease Research Center, The Second Affiliated Hospital of Anhui Medical University, Anhui Medical University, 678 Fu Rong Road, Hefei, Anhui Province, China. zhaopumcmd@yeah.net.|Anhui Medical University, Hefei, 230601, Anhui, China. zhaopumcmd@yeah.net.
Bing
B
Zhao
D002550:Cerebral Veins / Q000000981:diagnostic imaging / Q000473:pathology*; D006801:Humans; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging / Q000473:pathology*
Aneurysm; Basal vein of Rosenthal; Deep venous drainage patterns; Idiopathic subarachnoid hemorrhage; Peri-mesencephalic subarachnoid hemorrhage; Subarachnoid hemorrhage