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Table 2: Imaging characteristics of patients with MMD
Characteristic n (%) (n = 58 Hemispheres)
A. MRI 
 1. Pattern of infarct Acute Infarcts Chronic Infarcts
  Watershed 9 (15.5) 15 (25.9)
  Territorial 3 (5.2) 5 (8.6)
  Cortical 2 (3.4) 3 (5.2)
  Isolated subcortical 1 (1.7) 2 (3.4)
B. DSA 
 1. Laterality (n = 29) 
  Bilateral 27 (93.1)
  Unilateral 2 (6.9)
 2. Vessels involved (n = 166 vessels) Narrowed Occluded
  Distal ICA 19 (11.4) 37 (22.2)
  Proximal MCA 12 (7.2) 39 (23.5)
  Proximal ACA 17 (10.2) 25 (15.0)
  PCA 8 (4.8) 1 (0.6)
  Basilar artery (29 vessels) 1 (0.6) 0 (0)
 3. Suzuki stage Right Left
  I 2 (7.1) 2 (7.1)
  II 0 (0) 1 (3.6)
  III 5 (17.9) 2 (7.1)
  IV 4 (14.3) 10 (35.7)
  V 16 (57.1) 13 (46.4)
  VI 1 (3.6) 0 (0)
 4. Collaterals (n = 58 hemispheres) 
  Superficial meningeal 
   Leptomeningeal 
    Anterior 27 (46.6) 24 (41.4)
    Posterior 21 (36.2) 20 (34.5)
   Durocortical 
    Anterior 21 (36.2) 18 (31.1)
    Posterior 3 (5.2) 5 (8.6)
  Deep parenchymal 
   Subependymal anastomotic 
    Anterior 6 (10.3) 6 (10.3)
    Posterior 5 (8.6) 5 (8.6)
   Inner thalamic 
    Anterior 8 (13.8) 6 (10.3)
    Posterior 8 (13.8) 7 (12.1)