World Health Organization (WHO) classification of TETs, 5th edition [6]

TMTCTNENs
Type A TMSquamous cell carcinoma of the thymusTypical carcinoid of the thymus
Type AB TMBasaloid carcinoma of the thymusAtypical carcinoid of the thymus
Type B1 TMLymphoepithelial carcinoma of the thymusSmall cell carcinoma of the thymus
Type B2 TMClear cell carcinoma of the thymusLarge cell neuroendocrine carcinoma of the thymus
Type B3 TMLow-grade papillary adenocarcinoma of the thymus-
Micronodular TM with lymphoid stromaMucoepidermoid carcinoma of the thymus-
Metaplastic TMTC with adenoid cystic carcinoma-like features-
Lipofibroadenoma of the thymusEnteric-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