Table 2.

Summary of Reconstructed Vascular Lesions

Case no. and block	Diagnosis	Total length of reconstruction (μm)	Branching pattern (axial* or dichotomous†)	Sequence and spacing of vascular changes after branch point (N, P, C, or D × distance in μm)
1a	PPH	445	Dichotomous	Branch 1: C× 230, P× 200
				Branch 2: P× ?
1b	PPH	245	Dichotomous	Branch 1: N× 35, C× 105, P× 100
				Branch 2: medial hypertrophy× ?
1c	PPH	170	Dichotomous	Branch 1: N× 35, C× 65, P× 70
				Branch 2: medial hypertrophy× ?
1d	PPH	250	Dichotomous	Branch 1: N× 40, C× 55, P× 80
				Branch 2: N× 30, P× 145
2	PPH	260	Dichotomous	Branch 1: N× 25, P× 120, D× 80
				Branch 2: N× 35, P× 110, D× 80
3	Cirrhosis	410	Axial	P× 400, D× ?
4	AIDS	540	Dichotomous	Branch 1: N× 200, P× 70
				Branch 2: N× 55, P× 200
5a	Scleroderma	340	Axial	N× 10, C× 50, P× 300
5b	Scleroderma	340	Dichotomous	Branch 1: P× 200
				Branch 2: N× 35, C× 70, P× 100
6	Normal	145	Dichotomous	Branch 1: N
				Branch 2: N

*Axial = A medium-sized axial pulmonary artery gives rise to a branching, smaller-sized artery.

^†Dichotomous = A normal-appearing vessel bifurcates into two equally sized branches.

N = Normal pulmonary artery.

C = Concentric-obliterative lesion.

P = Plexiform lesion.

D = Dilatation lesion.

? = Vessel disappears in distal sections.