Normal Adult Human Liver Biopsy

Table 2

The Normal Adult Human Liver Biopsy: A Quantitative Reference Standard

table 2. Number of Portal Tracts, Terminal Hepatic Veins, and Solitary Bile Duct Profiles or Cuboidal Strings of Cells per Biopsy

Structure	Average	Total	Range	95% Confidence Interval

Portal tracts	21 ± 10	338	5-38	16-26
Portal triads	11 ± 6	175	3-23	8-14
Portal dyads	8 ± 5	133	1-18	6-11
BD1 + HA	7 ± 5	109	1-17	4-9
BD1 + PV	1 ± 1	14	0-2	0-1
HA + PV	1 ± 1	10	0-2	0-1
Terminal hepatic veins	7 ± 5	115	0-15	5-10
Solitary bile ducts	4 ± 6	67	0-21	2-7
Cuboidal strings	5 ± 5	81	0-16	3-8

NOTE. Among portal tracts, the number of traditional portal triads is given, along with nontraditional dyads composed of interlobular bile ducts (BD1) and hepatic arteries (HA), interlobular bile ducts and portal vein (PV), or hepatic artery and portal vein. The total number of structures observed also is given, along with the numerical range and 95% confidence intervals of structures observed per biopsy.