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Table 3 Histopathology after neoadjuvant chemotherapy

From: 18FDG-PET-CT identifies histopathological non-responders after neoadjuvant chemotherapy in locally advanced gastric and cardia cancer: cohort study

Parameter Median (range) n = 30 %
ypT-category
 ypT0   2 7
 ypT1 2 7
 ypT2 1 3
 ypT3 21 70
 ypT4a 3 10
 ypT4b 1 3
Number of removed lymph nodes 43 (21–113)  
ypN-category
 ypN0   10 33
 ypN1 5 17
 ypN2 7 23
 ypN3 8 27
 ypN3 (AEG) 3 10
 ypN3a (GC) 4 14
 ypN3b (GC) 1 3
Tumor regression grading
 Complete regression (Ia)   2 7
  <  10% residual tumor (Ib) 9 30
  ≥ 10% and < 50% residual tumor (II) 6 20
  ≥ 50% residual tumor (III) 8 27
 no regression (IV) 5 16
Modified tumor regression grading
 Minor (grade II - IV, ≥ 10% residual tumor)   19 63
 Major (grade Ia - Ib, <  10% residual tumor) 11 37