Established from the surgical resection of a left parieto-occipital glioblastoma from a 47-year-old man in 1980; cells were described to secrete plasminogen activator, to be clonogenic in soft agar and to be tumorigenic in nude mice; DNA fingerprinting showed unequivocally that SNB-19 is a subclone of the astrocytoma cell line U-251 MG)