What's the longest time a GBM patient has managed to stay alive on Avastin infusions? My husband is 62, had over 70% of the brain tumor removed in July, had radiation and Temodar. Now, he just started the Avastin Infusions 2xmonth, but he's very VERY weak on the legs, very lethargic and with diminishing vision. Thank you for any info you can provide.