BTK and astrocytoma (excluding glioblastoma): More in detail, p65BTK positivity was found in samples from 13 patients (BTK+), among these, nine were astrocytomas, 3 OD and 1 OA and were distributed in the brain lobes as follows: 4 in the frontal lobe (31%, 2 left, 2 right), 4 in temporal lobe (31%, 2 left, 2 right), 3 in the parietal lobe (23%, 2 right, 1 left) and 2 in occipital lobe (15%, 1 right, 1 left; Figures 2A,B).