Table 1.

Immunohistochemical assay results by any method with 0, 1+, 2+, and 3+ scoring from outside laboratories compared with FISH assay results from the BCIRG central laboratories

Outside laboratory immunohistochemistry scores (0-3+)
01+2+3+Total
FISH negative (%)538 (96.4)230 (93.9)165 (83.3)89 (21.9)1,022 (72.6)
FISH positive (%)20 (3.6)15 (6.1)33 (16.7)317 (78.1)385 (27.4)
Total (%)558 (100)245 (100)198 (100)406 (100)1,407 (100)
  • NOTE: There were also 24 FISH failures specimens in the BCIRG central laboratory that had outside IHC results with 0 to 3+ scoring: 14 were scored as 0, 4 as 1+, 2 as 2+, and 5 as 3+.