GFAP and neoplasm: In all patients, there was a significant reduction in tumour cell number following treatment with 15 μM AZ or greater, compared to untreated cells (mean GFAP + cells = 462.6 ± 102.4), with a mean total GFAP + cell count of 66 ± 23.51 for 15 μM AZ, 23.57 ± 18.19 for 25 μM AZ, 20.86 ± 17.72 for 50 μM AZ, and 21.57 ± 17.78 for 100 μM AZ (Fig. 1).