CD163 and thymoma: A high percentage of CD163+ TAMs was observed in 93.8% (15/16) of thymic carcinoma samples and 64.2% (34/53) of thymoma samples (including 2 type A, 12 type AB, 6 type B1, 10 type B2 and 4 type B3), which were statisfically significantly different (p = 0.024) (Table 3b).