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Table 3 Under- and over-grading of tumors by pre-op EB versus frozen section

From: Can addition of frozen section analysis to preoperative endometrial biopsy and MRI improve identification of high-risk endometrial cancer patients?

Pre-op EB Number (preoperative histology) Postoperative histology Number %
Under-graded 19 (G1or G2)    
   Serous 7 36.8
   G3 8 42.1
   CL 2 10.5
   CS 1 5.3
   Others 1 5.3
Over-graded 2 (G3)    
   G2 2 100
Frozen section Number (intraoperative histology) Postoperative histology Number %
Under-graded 21 (G1or G2)    
   Serous 8 38.1
   G3 9 42.9
   CL 2 9.5
   CS 2 9.5
Over-graded 1 (G3)    
   G2 1 100
  1. G1, G2, G3 endometrioid adenocarcinoma grade 1, 2, 3
  2. CL clear cell carcinoma
  3. S serous carcinoma
  4. CS carcinosarcoma