CAMELYON 17 Challenge: A Comparison of Traditional Machine Learning (SVM) with the Deep Learning Method

Table 2

CAMELYON 17’s pathologic lymph node categorization (pN stage).

pN stage	Characteristics
pN0	Histologically, there was no regional lymph node metastasis, and isolated tumour cells (ITC) were not examined separately
pN0(i+)	Histologically, there was no regional lymph node metastasis, immunohistochemistry was positive, and the tumour focus was ≤0.2 mm
pN1	Metastasis of 1-3 axillary lymph nodes on the same side or endoscopic metastasis of internal mammary sentinel lymph nodes, which is not clinically obvious
pN1(mi)	There are micrometastases, the maximum diameter is >0.2 mm, ≤2.0 mm
pN2	4-9 axillary lymph node metastasis, or clinically apparent internal mammary sentinel lymph node metastasis under the microscope, but no axillary lymph node metastasis