Myofibroblastic cell activation and neovascularization predict native liver survival and development of esophageal varices in biliary atresia

Table 1 Prevalence of centrizonal microvessels in biliary atresia patients (n = 32) at the time of portoenterostomy and in control (n = 35) livers

Number of patients	BA	Controls
Patients
Grade 1	0	14
Grade 2	5	21
Grade 3	9	0
Grade 4	18	0
	P < 0.0001

Data presented as number of patients. Comparison between groups was performed with Mann-Whitney U-test. Microvessel grades: 1: No central zones with microvessels; 2: < 5% of central zones with microvessels; 3: 5%-50% of central zones with microvessels; and 4: > 50% of central zones with microvessels. BA: Biliary atresia.