MRA Study on Variation of the Circle of Willis in Healthy Chinese Male Adults

Table 5

Posterior circulation developmental morphology.

Types	Integral posterior circulation			Nonintegral posterior circulation								Total proportion
	a	b	c	d	e	f	g	h	i	j	k
Cases	230	27	104	1066	512	90	63	61	37	28	28	16.07%