Table 1 Categories used for morphologic analysis

From: Ampullary carcinoma is often of mixed or hybrid histologic type: an analysis of reproducibility and clinical relevance of classification as pancreatobiliary versus intestinal in 232 cases

 

Analysis #1

 

Analysis #2

 

Purist approach

 

Forced-binary approach

 

4 Categories

 

3 Categories

Tubular

Pure INT

Pure INT

INT-predominant

 

Mixed PB-INT

INT-predominant

 
  

PB-predominant

PB-predominant

 

Pure PB

Pure PB

 

Non-tubular

Other

Other

Other

  1. Abbreviations: INT, intestinal; PB, pancreatobiliary.
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