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Japanese Journal of Clinical Oncology Advance Access published online on July 8, 2009
Japanese Journal of Clinical Oncology, doi:10.1093/jjco/hyp075
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© The Author (2009). Published by Oxford University Press. All rights reserved

Is there a Role of the Histologic Subtypes of Papillary Renal Cell Carcinoma as a Prognostic Factor?

Ja Hyeon Ku1, Kyung Chul Moon2, Cheol Kwak1, Hyeon Hoe Kim1 and Sang Eun Lee1

1 Department of Urology, Seoul National University College of Medicine
2 Department of Pathology, Seoul National University College of Medicine, Seoul, Korea

For reprints and all correspondence: Cheol Kwak, Department of Urology, Seoul National University Hospital, 28, Yongon Dong, Jongno Ku, Seoul 110-744, Korea. E-mail: mdrafael{at}snu.ac.kr

Received March 30, 2009; accepted June 7, 2009

Objective: The aim of this study was to compare type 1 and type 2 papillary renal cell carcinoma (RCC) for validating this subclassification as a prognostic factor.

Methods: A total of 70 patients with chromophobe RCC were included in the analysis. Patients with papillary RCC were categorized into type 1 (n = 33) and type 2 (n = 37).

Results: The median progression-free survival was 31.0 months for the type 1 group and 12.0 months for the type 2 group (P = 0.001). The median cancer-specific survival was 41.1 months for the type 1 group and 24.0 months for the type 2 group (P = 0.097). Multivariate Cox proportional hazards model for patients with papillary RCC showed that no variables including histologic subtyping were independent predictors of progression-free and cancer-specific survival.

Conclusions: In the present study, the type of papillary RCC does not reach independent prognostic significance.

Key Words: kidney neoplasm • papillary renal cell carcinoma • prognosis • survival


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