Article Figures & Data
Figures
- FIG 1.
STA classification. Class A corresponds to classic STA anatomy with a single frontal and parietal branch. Classes B1, B2, and B3 illustrate additional frontal, parietal, or both branches, respectively. Class C1, C2, and C3 illustrate hypoplasia of the parietal, frontal, or both branches, respectively. Class D1 and D2 illustrate aplasia of the parietal and frontal branches, respectively.
- FIG 2.
PAA classification. The thin solid line indicates the vertex; the dashed vertical line indicates the external auditory canal midline; and the thick solid line indicates the helix. Class 1 illustrates PAA terminating below the helix, class 2 illustrates the PAA terminating at the helix, class 3 illustrates the PAA terminating between the helix and the vertex, and class 4 illustrates the PAA terminating at the vertex. For classes 3 and 4, if the PAA advances anteriorly passing the vertical line, the class is annotated with “a” for anteriority and, if not, “p” for posteriority.
- FIG 3.
PAA-EDAS candidates.
- FIG 4.
Representative illustrations of late arterial phase external carotid artery angiography with postoperative collateral formation after PAA-EDAS. A, Right PAA-EDAS case of 1.7-year-old boy representing Matsushima grade A. B, Right PAA-EDAS case of 8-year-old boy representing Matsushima grade B.
Tables
Demographics Value Sex (n = 572) Male 255 (44.6%) Female 317 (55.4%) Age of diagnosis (yr) Younger than 3 55 (9.7%) 3∼7 230 (40.2%) 8∼11 188 (32.8%) 12∼14 73 (12.7%) 15∼18 26 (4.5%) Unilateral (n = 112) Right 58 (51.8%) Left 54 (48.2%) Average follow-up period (yr) 6.1 Distribution No. (%) STA A 380 (33.2%) B1 254 (22.2%) B2 139 (12.2%) B3 250 (21.8%) C1 33 (2.8%) C2 26 (2.3%) C3 26 (2.3%) D1 19 (1.7%) D2 17 (1.5%) Total 1144 (100%) PAA 1 563 (49.2%) 2 127 (11.1%) 3a 162 (14.2%) 3p 267 (23.3%) 4a 18 (1.6%) 4p 8 (0.6%) Total 1144 (100%)
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