title: Dural arteriovenous fistula involving the transverse sigmoid sinus after treatment: assessment with magnetic resonance digital subtraction angiography.
abstract: BACKGROUND
  The purpose of this study was to evaluate the utility of magnetic resonance digital subtraction angiography (MRDSA) in showing the presence or absence of retrograde venous drainage (RVD) in patients with intracranial dural arteriovenous fistula (DAVF) involving the transverse sigmoid sinus (TSS) after treatment.
  
  
  METHODS
  Of 16 patients with DAVF involving the TSS, 13 underwent digital subtraction angiography (DSA) and MRDSA before and after treatment, and 3 underwent DSA before treatment and DSA and MRDSA after treatment. Five patients underwent these procedures twice after treatment. A total of 21 examinations after treatment were evaluated retrospectively. The presence or absence of DAVF and RVD was decided on the basis of the DSA findings. Two neuroradiologists reviewed the MRDSA findings concerning the presence or absence of DAVF and RVD.
  
  
  RESULTS
  DSA showed residual DAVF in 9 and residual RVD in 5 of 21 examinations. MRDSA revealed residual DAVF in 8 of 21 examinations. MRDSA did not show residual DAVF in one examination because of a very small (low-flow) residual DAVF without RVD. MRDSA identified residual RVD in 5 of 21 examinations. MRDSA was completely consistent with DSA concerning the presence or absence of residual RVD.
  
  
  CONCLUSIONS
  MRDSA could evaluate the presence or absence of RVD in patients with DAVF involving TSS after treatment. MRDSA may give reliable information as to whether patients with DAVF involving the TSS should undergo additional DSA after treatment.
authors: Department of Radiology, Toyama University, 2630 Sugitani, Toyama 930-0194, Japan. kyo@med.u-toyama.ac.jp
authors: Kyo
authors: K
authors: Noguchi
authors: Naoya
authors: N
authors: Kuwayama
authors: Michiya
authors: M
authors: Kubo
authors: Yuichi
authors: Y
authors: Kamisaki
authors: Gakuto
authors: G
authors: Tomizawa
authors: Keisuke
authors: K
authors: Kameda
authors: Hideto
authors: H
authors: Kawabe
authors: Shinichi
authors: S
authors: Ogawa
authors: Hiroshi
authors: H
authors: Kato
authors: Masashi
authors: M
authors: Shimizu
authors: Naoto
authors: N
authors: Watanabe
authors: Hikaru
authors: H
authors: Seto
mesh_terms: D000368:Aged; D015901:Angiography, Digital Subtraction / Q000379:methods*; D020785:Central Nervous System Vascular Malformations / Q000175:diagnosis* / Q000503:physiopathology; D005260:Female; D006801:Humans; D018810:Magnetic Resonance Angiography; D008297:Male; D008875:Middle Aged