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 Indian J Med Microbiol  
 

a: The microcatheter wire combination buckles in the hypoplastic sinus, probably engaging septa or a bridging vein. Spasm or tear of a bridging vein can result in brain stem ischaemia or hemorrhage. b: On reintroduction, the microcatheter wire combination is passed into the sinus. c: Gentle injection shows a septate petrosal sinus

a: The microcatheter  wire combination buckles in the hypoplastic sinus, probably engaging septa or a bridging vein. Spasm or tear of a bridging vein can result in brain stem ischaemia or hemorrhage.
b: On reintroduction, the microcatheter  wire combination is passed into the sinus.
c: Gentle injection shows a septate petrosal sinus