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) |