Unilateral Aplasia versus Bilateral Aplasia of the Vertebral Artery: A Review of Associated Abnormalities

Table 1

Distribution of single cases of the vertebral artery (VA) aplasia in various countries.

Side; of VA aplasia	Countries [references]
Bilaterally				Canada [14, 25, 38]	China [15, 34]		France [33, 35]	Germany [20]			India [16, 21, 26, 30, 39]	Israel [22]	Italy [23, 31, 40]	Japan [17, 27, 29, 36]	Lithuania [44]				Spain [41]			Turkey [28]	UK [42]	USA [18, 19, 24, 32, 37, 43]
Number				3	2		2	1			5	1	3	4	1				1			1	1	6	31
Left	Australia [64]	Belgium [74]			China [45, 81]	Croatia [65]	France [75]	Germany [55]	Greece [76]		India [30, 46]		Italy [47, 66]	Japan [48–52, 61–63, 67]				South Korea [57]	Spain [53, 56]	Sweden [54]	Switzerland [58]	Turkey [59, 68, 80, 109]		USA [60, 69–73, 77–79]
Number	1	1			2	1	1	1	1		3		2	9				1	7	1	1	4		10	46
Right			Brazil [95]	Canada [96]	China [108, 110]		France [75, 93, 97]	Germany [90]	Greece [98]	Grenada [82]	India [86, 106]		Italy [40]	Japan [83, 84, 87, 94, 99, 100]		Serbia [101]	South Africa [88]	South Korea [85, 91]				Turkey [92, 107]		USA [89, 102–105]
Number			1	1	2		3	1	1	1	2		1	6		2	1	2				2		5	31
	1	1	1	4	6	1	6	3	2	1	10	1	6	19	1	2	1	3	8	1	1	7	1	21	108

Alphabetical order. Recent case is included.