PTEN Deletions Are Associated With Tumor Progression But Unrelated to Patient Prognosis in Muscle-Invasive Urothelial Bladder Carcinomas: A Large Multi-Center Validation Study on 2710 Urothelial Bladder Carcinomas.

ABSTRACT: The tumor suppressor gene PTEN plays an important role in many cancer types. Mechanism of PTEN inactivation includes gene mutations and deletions. In this large multi-center study, we analyzed the impact of PTEN deletions on tumor aggressiveness, patient prognosis, and p53 and p16 alterations, especially in muscle-invasive urothelial bladder carcinomas to expand the results from our previous study on 686 pTa to pT4 urothelial bladder carcinomas. The PTEN copy number status was analyzed by fluorescence in situ hybridization (FISH) on more than 2700 urothelial bladder carcinomas in a tissue microarray format. PTEN deletion data were compared with clinico-pathological parameters in pTa and pT2-4 carcinomas and clinical outcomes in pT2-4 carcinomas, immunohistochemical p16 and p53 expression,

SUBMITTER: Kluth M 

PROVIDER: S-EPMC12831224 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature