The T classification of clinically localized prostate cancer. An appraisal based on disease outcome after radiation therapy.

Abstract:

BACKGROUND:This study was performed to evaluate the use of the 1992 International Union Against Cancer (UICC)/American Joint Committee on Cancer (AJCC) T categories for localized prostate cancer treated with radiation therapy and to compare the prognostic power of this system with the Whitmore-Jewett scheme. METHODS:The outcome for 427 men with Stages A2-C or T1a-T4b prostate cancers, followed for a mean of 32 months after treatment, was evaluated for relapse or rising prostate-specific antigen (PSA) levels, disease relapse, metastatic failure, and local recurrence relative to the two staging systems. Univariate and multivariate analysis was used to compare the two staging systems. The T categories were based on digital rectal examination. RESULTS:At 5 years, the actuarial incidence of relapse or rising PSA level was as follows: Stage A2, 29%; Stage B, 41%; Stage C, 62%. The corresponding results according to T category were as follows: T1a, 0%; T1b, 37%; T1c, 23%; T2a, 39%; T2b, 38%; T2c, 42%; T3a, 53%; T3c, 68%; T4b, greater than 75%. Too few patients were in the T3b and T4a categories. The following five-category grouping was significantly superior prognostically to the Whitmore-Jewett system: T1a, T1c, T1b/T2, T3, T4. The actuarial incidences of relapse or rising PSA at 5 years were as follows: T1a, 0%; T1c, 23%; T1b/T2, 41%; T3, 61%; and T4, 75%. No differences were evident within the T2 or T3 categories. CONCLUSIONS:The current UICC/AJCC system appears to be a valid method for categorizing a primary prostate carcinoma. This system defines a greater number of meaningful tumor categories and is prognostically superior to the traditional Whitmore-Jewett scheme.

journal_name

Cancer

journal_title

Cancer

authors

Zagars GK,Geara FB,Pollack A,von Eschenbach AC

doi

10.1002/1097-0142(19940401)73:7<1904::aid-cncr2820

subject

Has Abstract

pub_date

1994-04-01 00:00:00

pages

1904-12

issue

7

eissn

0008-543X

issn

1097-0142

journal_volume

73

pub_type

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