title: Papillary renal cell carcinoma: a clinicopathological study of 35 cases.
abstract: OBJECTIVE
  The objective of the present study was to characterize the clinicopathological features of histologically defined papillary renal cell carcinoma (RCC).
  
  
  METHODS
  The present study included a total of 35 patients who were treated by radical surgery and subsequently diagnosed as having papillary RCC between April 1995 and June 2004. Clinicopathological data of these patients were retrospectively reviewed according to the previously reported classification system (Mod. Pathol. 1997; 10: 537-44).
  
  
  RESULTS
  Of these 35 patients, 23 (65.7%) and 12 (34.3%) were diagnosed as type 1 and type 2 papillary RCC, respectively. Despite the lack of significant differences in clinical parameters between these two groups, including age, gender, clinical stage and metastasis, the incidence of symptomatic disease in patients with type 2 papillary RCC was significantly higher than that in those with type 1 papillary RCC. Pathological examinations demonstrated that there were no significant differences between these two groups in pathological stage, tumor grade or vascular invasion. Furthermore, there was no significant difference between these two groups in overall or recurrence-free survival.
  
  
  CONCLUSIONS
  Although the present study included a small number of patients with short follow-up period, the clinicopathological features including prognoses were almost similar between patients with type 1 and type 2 papillary RCC; therefore, careful postoperative follow-up should be considered for patients with papillary RCC irrespective of morphological subtype.
authors.affiliation: Department of Urology, Kobe University School of Medicine, Kobe, Japan.
authors.forename: Kazuki
authors.initials: K
authors.lastname: Yamanaka
authors.forename: Hideaki
authors.initials: H
authors.lastname: Miyake
authors.forename: Isao
authors.initials: I
authors.lastname: Hara
authors.forename: Taka-Aki
authors.initials: TA
authors.lastname: Inoue
authors.forename: Keisuke
authors.initials: K
authors.lastname: Hanioka
authors.forename: Masato
authors.initials: M
authors.lastname: Fujisawa
mesh_terms: D000368:Aged; D002292:Carcinoma, Renal Cell / Q000145:classification / Q000401:mortality / Q000473:pathology* / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007680:Kidney Neoplasms / Q000145:classification / Q000401:mortality / Q000473:pathology* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D009392:Nephrectomy; D011379:Prognosis; D012189:Retrospective Studies