title: Urothelial bladder cancer in young adults: Diagnosis, treatment and clinical behaviour.
abstract: BACKGROUND
  The aim of the study is to reveal pathologic characteristics and clinical behaviour of patients 40 years old or younger diagnosed with and treated for urothelial bladder carcinoma.
  
  
  METHODS
  We retrospectively analyzed the clinical and pathologic data of 91 patients, initially diagnosed and treated at our institution from May 1996 to December 2014. Cancer recurrence was defined as new occurrence of bladder cancer at the same or different sites of the bladder. Cancer progression was defined as an increase in stage or grade in any of the recurrences.
  
  
  RESULTS
  The mean age was 33.8 (range: 17-40) years. The pathological examination after transurethral resection revealed 83 (91.2%) patients with non-muscle invasive urothelial bladder cancer, and 8 (8.8%) patients with muscle invasive urothelial bladder cancer. According to the distribution of grade, there were 75, 4 and 12 patients with grade 1, grade 2 and grade 3 diseases, respectively. Initial cancer staging was: pTa with 40 patients (43.9%), pT1 with 43 patients (47.2%), pT2 with 7 patients (7.6%), and pT3 with 1 patient (1.2%). While 17 (18.6%) patients recurred in the follow-up, 10 (10.9%) patients had progression. There were no differences in recurrence and progression rates in the Ta and T1 stages between groups (p = 0.233, p = 0.511, respectively).
  
  
  CONCLUSIONS
  The risk of progression increased as the number of relapses increased. The clinical behaviour of high-stage and high-grade disease in younger patients is similar to the older group.
authors.affiliation: Izmir Bozyaka Training and Research Hospital, Urology Clinic, Turkey.
authors.forename: Bülent
authors.initials: B
authors.lastname: Gunlusoy
authors.affiliation: Izmir Bozyaka Training and Research Hospital, Urology Clinic, Turkey.
authors.forename: Yasin
authors.initials: Y
authors.lastname: Ceylan
authors.affiliation: Izmir Bozyaka Training and Research Hospital, Urology Clinic, Turkey.
authors.forename: Tansu
authors.initials: T
authors.lastname: Degirmenci
authors.affiliation: Izmir Bozyaka Training and Research Hospital, Urology Clinic, Turkey.
authors.forename: Zafer
authors.initials: Z
authors.lastname: Kozacioglu
authors.affiliation: Izmir Bozyaka Training and Research Hospital, Urology Clinic, Turkey.
authors.forename: Tarık
authors.initials: T
authors.lastname: Yonguc
authors.affiliation: Izmir Bozyaka Training and Research Hospital, Urology Clinic, Turkey.
authors.forename: Halil
authors.initials: H
authors.lastname: Bozkurt
authors.affiliation: Izmir Bozyaka Training and Research Hospital, Urology Clinic, Turkey.
authors.forename: Ozgü
authors.initials: O
authors.lastname: Aydogdu
authors.affiliation: Izmir Bozyaka Training and Research Hospital, Urology Clinic, Turkey.
authors.forename: Volkan
authors.initials: V
authors.lastname: Sen