HSPB1 and thymoma: Separate analysis of HSP27 and 70 serum concentrations in patients with thymomas compared to volunteers showed no significant differences (HSP27[pg/ml]: 412.5 ± 73.2 vs. 334.6 ± 50.2; p = 0.374 and HSP70[ng/ml]: 1.7 ± 0.3 vs. 1.3 ± 0.1; p = 0.161, respectively).