Noteworthy, the median PTX3 level at the onset of GvHD was 25.30 ng/ml (range = 5.15; 847.44), a value significantly higher than that of the “No GvHD” group [14.49 ng/ml (range = 5.10; 57.44), p = 0.004, Figure 3A]. Here, PTX3 is linked to graft versus host disease.