World Health Organization (WHO) classification of TETs, 5th edition [6]
| TM | TC | TNENs |
|---|---|---|
| Type A TM | Squamous cell carcinoma of the thymus | Typical carcinoid of the thymus |
| Type AB TM | Basaloid carcinoma of the thymus | Atypical carcinoid of the thymus |
| Type B1 TM | Lymphoepithelial carcinoma of the thymus | Small cell carcinoma of the thymus |
| Type B2 TM | Clear cell carcinoma of the thymus | Large cell neuroendocrine carcinoma of the thymus |
| Type B3 TM | Low-grade papillary adenocarcinoma of the thymus | - |
| Micronodular TM with lymphoid stroma | Mucoepidermoid carcinoma of the thymus | - |
| Metaplastic TM | TC with adenoid cystic carcinoma-like features | - |
| Lipofibroadenoma of the thymus | Enteric-type adenocarcinoma of the thymus | - |
| Adenocarcinoma not otherwise specified (NOS) of the thymus | ||
| Adenosquamous carcinoma of the thymus | ||
| Sarcomatoid carcinoma of the thymus | ||
| Undifferentiated carcinoma of the thymus | ||
| TC NOS |
-: blank cells