DATA FORM FOR CANCER CLASSIFICATION - EXTRAHEPATIC BILE DUCTS
| HISTOPATHOLOGIC TYPE | HISTOPATHOLOGIC GRADE | |||
| Carcinoma in situ | GX: | Grade cannot be assessed | ||
| Adenocarcinoma | G1: | Well differentiated | ||
| Papillary adenocarcinoma | G2: | Moderately differentiated | ||
| Adenocarcinoma, intestinal type | G3: | Poorly differentiated | ||
| Mucinous adenocarcinoma | G4: | Undifferentiated | ||
| Clear cell adenocarcinoma | ||||
| Segnet-ring cell carcinoma | ||||
| Adenosquamous carcinoma | ||||
| Squamous cell carcinoma | ||||
| Small cell (oat) carcinoma | ||||
| Undifferentiated carcinoma | ||||
| Carcinoma, NOS | ||||
| HISTOPATHOLOGIC TYPE | HISTOPATHOLOGIC GRADE | |||
| Sarcoma | Not applicable | |||
| Carcinoid tumor | ||||
| Comments: |