Figure 6. Positive predictability of HER2 status in biopsy specimens was significantly correlated with the number of fragments (P = 0.0052).

For paired negative biopsy and positive resection specimens (positive conversion), the mean number of tissue fragments was 2.6 (range 1–5), while those positive in both biopsy and resection specimens had a mean biopsy fragment number of 4.7 (range 1–10).