Fig. 1

Principle of comparison of LN distribution. Atlas of lymph node metastases (mLN) (a, d) and non-pathological lymph nodes (npLN) (b, e). (npLN-Hot Spots (e): atlas containing only areas with ≥ 3 npLN). c, f mLN outside the areas where npLN (c) or npLN hot spots (f) were observed