AVP and ductal breast carcinoma in situ: Weak immunoreactivity was detected in 1 of 16 UH (6%) in 5% of epithelial cells (mean ± SD: 5 ± 1.15; median: 4.5; range: 4 - 7), 1 of 15 ADH (7%) in 2% of cells (mean ± SD: 2 ± 0.67; median: 2; range: 1 - 3) and 1 of 6 DCIS low-grade (17%) in 2% of cells (mean ± SD: 2 ± 0.82; median: 2; range: 1 - 3).