Protein expression and gene copy number analysis of topoisomerase 2alpha, HER2 and P53 in minimally invasive urothelial carcinoma of the urinary bladder--a multitissue array study with prognostic implications.

Background: Due to their variable clinical course, there is a need for new prognostic parameters in minimally invasive (stage T1) bladder carcinomas.

Materials And Methods: Using multitissue arrays, protein expression and gene copy numbers of topoisomerase (TOP2alpha), HER2 and p53 were investigated by immunohistochemistry and by fluorescence in situ hybridization (FISH) in 73 T1 tumors. The results were compared with tumor recurrence and progression.