title: Proliferation indices as independent prognostic factors in papillary Ta-T1 transitional cell bladder tumours.
abstract: A cohort of 148 patients with papillary Ta-T1 transitional cell carcinomas (TCCs) was followed up for over 10 years and flow cytometric (DNA ploidy, S phase fraction) and morphometric variables (5 nuclear factors, volume corrected mitotic index) were related to prognosis during this period. Recurrence-free survival was significantly related to DNA ploidy, S phase fraction and M/V index. Progression in T-category was predicted by M/V index, S phase fraction, DNA ploidy and WHO grade. The same variables predicted progression in N- and M-categories. In a multivariate analysis only M/V index and S phase fraction were independent predictors of progression. Univariate analysis showed that M/V index, SPF, DNA ploidy and WHO grade predicted survival. In a multivariate survival analysis only M/V index and SPF were independent predictors. The results showed that proliferation indices had independent prognostic value in papillary Ta-T1 TCCs and the grading of these tumours could be based on the proliferation indices. Papillary Ta-T1 tumours with a M/V index value < or = 10/mm2 or SPF < or = 10% had a favourable prognosis whereas tumours with M/V index > 10/mm2 or SPF > 10% had a high malignant potential.
authors.affiliation: Department of Pathology, University of Kuopio, Finland.
authors.forename: P K
authors.initials: PK
authors.lastname: Lipponen
authors.forename: M J
authors.initials: MJ
authors.lastname: Eskelinen
authors.forename: K
authors.initials: K
authors.lastname: Jauhiainen
authors.forename: R
authors.initials: R
authors.lastname: Terho
authors.forename: S
authors.initials: S
authors.lastname: Nordling
mesh_terms: D000368:Aged; D002295:Carcinoma, Transitional Cell / Q000235:genetics / Q000401:mortality / Q000473:pathology*; D002467:Cell Nucleus / Q000473:pathology; D005260:Female; D005434:Flow Cytometry; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D008940:Mitotic Index / Q000502:physiology; D011003:Ploidies; D011379:Prognosis; D016196:S Phase / Q000502:physiology; D001749:Urinary Bladder Neoplasms / Q000235:genetics / Q000401:mortality / Q000473:pathology*