Some images of the thymic epithelial tumors. White arrow reveals tumor. The WHO type, Masaoka staging, and tumor volumes are shown: (A) type AB, stage I, 6.2 cm3, (B) type B2, stage I, 2.3 cm3, (C) type AB, stage III, 104.4 cm3, (D) thymic carcinoma, stage IVb, 526.2 cm3. Relatively smaller volume of TETs is shown in (A) and (B). Relatively larger volume of TETs is shown in (C) and (D). We found that even different WHO subtypes of TETs can show a similar tumor volume. TETs, thymic epithelial tumors.