Table 2.

Slide-label classification based on the WHO TNM classification system [9].

Type	Description	Slide Label
Macro-metastasis	Tumor > 2 mm	Positive
Micro-metastasis	Tumor > 0.2 mm and ≤ 2 mm	Positive
Isolated tumor cells (ITC)	Tumor ≤ 0.2 mm or ≤ 200 tumor cells	Negative
No tumor cells	No tumor cells	Negative