| Adenocarcinoma |
| Cribriform comedo-type adenocarcinoma |
| Medullary carcinoma |
| Micropapillary carcinoma |
| Mucinous (colloid) adenocarcinoma (>50% mucinous) |
| Serrated adenocarcinoma |
| Signet-ring cell carcinoma (>50% signet-ring cells) |
| Adenosquamous carcinoma |
| Spindle cell carcinoma |
| Squamous cell (epidermoid) carcinoma |
| Undifferentiated carcinoma |
