TABLE 5.

Variation of right superior lobar pulmonary artery.

Number of right middle pulmonary artery		Location of artery
		Between the mediastinal artery of the upper lobe and the superior artery of the lower lobe	Level of right inferior lobar superior pulmonary artery	Between superior inferior lobar artery and basilar artery trunk	Bifurcation of basilar artery	Under the bifurcation of the basilar artery trunk
1middle lobe artery (n = 128, 30.5%)		128 (100.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)
2 middle lobe arteries (n = 269, 64%)	1	258 (96.0%)	11 (4.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)
	2	6 (2.2%)	118 (43.9%)	122 (45.4%)	21 (7.8%)	2 (0.7%)
3 middle lobe arteries (n = 21, 5%)	1	21 (100%)	0 (0.0%)	0 (0.0%)	0 (0%)	0 (0.0%)
	2	0 (0.0%)	8 (38.1%)	11 (52.4%)	2 (9.5%)	0 (0.0%)
	3	0 (0.0%)	0 (0.0%)	6 (28.6%)	15 (71.4%)	0 (0.0%)
4 middle lobe arteries (n = 2, 0.5%)	1	2 (100.0%)	0 (0.0%)	0 (0.0%)	0 (0%.0)	0 (0.0%)
	2	0 (0.0%)	2 (100%)	0 (0.0%)	0 (0.0%)	0 (0.0%)
	3	0 (0.0%)	0 (0.0%)	0 (0.0%)	2 (100%)	0 (0.0%)
	4	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	2 (100.0%)