title: Chromosomal analysis of bladder cancer: technical aspects.
abstract: Of 77 patients with bladder carcinoma, 99 tissue specimens--including tissues of patients with recurrent tumors taken after radiotherapy or cytostatics--were subjected to chromosomal analysis. In 42 specimens, recognizable metaphases could be obtained after conventional Giemsa staining and in a smaller number after C- and/or G-banding. All except one had abnormalities of the chromosomes. Short-term cultures for 24-48 hr in RPMI 1640 plus 15% fetal calf serum plus penicillin-streptomycin gave better results than a direct technique (30 min in 0.075 M KCl + 0.1 microgram colcemid/ml at 37 degrees C, followed by fixation). In low stage/grade tumors the number of recognizable metaphases obtained after short-term cultures is lower than in higher stage/grade tissue specimens.
mesh_terms: D002478:Cells, Cultured; D002869:Chromosome Aberrations; D002871:Chromosome Banding; D005260:Female; D006801:Humans; D007621:Karyotyping / Q000379:methods*; D008297:Male; D008677:Metaphase; D001749:Urinary Bladder Neoplasms / Q000235:genetics*