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Vol. 34. Issue 5.
Pages 417-427 (January 2010)
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Vol. 34. Issue 5.
Pages 417-427 (January 2010)
Relationship of preoperative PSA velocity to histopathological findings in the surgical specimen and survival after radical prostatectomy
Relación de la velocidad preoperatoria de PSA con los hallazgos histopatológicos de la pieza quirúrgica y la supervivencia tras prostatectomía radical
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A. Rodríguez-Alonsoa,
Corresponding author
arodri68@gmail.com

Author for correspondence.
, A. González-Blancoa, S. Pita-Fernándezb, C. Bonelli-Martína, S. Pértega-Díazb, M. Cuerpo-Péreza
a Department of Urology, Hospital Arquitecto Marcide, Ferrol, A Coruña, Spain
b Unit of Clinical Epidemiology and Biostatistics, Hospital Juan Canalejo, A Coruña, Spain
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Abstract
Objective

To assess whether PSA velocity (PSV) is related to pathological findings in surgical specimen, biochemical recurrence-free survival (BRFS), cancer-related survival (CRS), and overall survival (OS).

Materials and methods

A retrospective, prospective, observational cohort study on 265 patients with prostate cancer (PCa) who underwent radical prostatectomy (RP) from 2000 to 2008. PSAV was calculated arithmetically and by linear regression analysis, using PSA values obtained in the year prior to diagnosis. A multivariate logistic regression analysis was performed to detect variables associated to extracapsular disease (ECD). Variables related to BRFS, CRS, and OS were analyzed using Kaplan-Meier methods (PSAV ≤ 3 vs. >3ng/mL/year) and a multivariate Cox regression analysis. The ability of PSA velocity to predict BRFS, CRS, and OS was evaluated using the concordance index.

Results

Median follow-up was 56.16 months (9.14–106.75). Median PSAV was 0.65 and 0.63ng/mL/year using the arithmetic and regression methods respectively. ECD was detected in 74 specimens (27.92%), and biochemical recurrence in 50 patients (18.87%). Cancerrelated mortality occurred in 4 patients (1.52%) and overall mortality was 16 patients (6.08%). In the multivariate analysis, PSAV was not related to ECD, but was independently associated to BRFS (RR: 1.06, 95% CI: 1.02–1.13, p=0.008), CRS (RR: 1.22, 95% CI: 1.00–1.50, p=0.048), and OS (RR: 1.35, 95% CI: 1.18–1.55, p<0.001).

Conclusions

PSAV is a preoperative variable that predicts for BRFS, CRS, and OS in patients undergoing RP. No association was found between PSA velocity and presence of ECD.

Keywords:
Prostatic cancer
Radical prostatectomy
Prostate-specific antigen velocity
Biochemical recurrence
Extracapsular disease
Survival
Resumen
Objetivo

Determinar si la velocidad de antígeno prostático específico (PSAV) se relaciona con los hallazgos histopatológicos de la pieza, la supervivencia libre de recidiva bioquímica (SLRB), la supervivencia cáncer-relacionada (SCR) y la supervivencia global (SG).

Material y métodos

Estudio observacional de cohorte retrospectivo y prospectivo formado por 265 pacientes con cáncer de próstata a los que se practicó prostatectomía radical (PR) entre 2000–2008. La PSAV fue calculada de forma aritmética y mediante regresión lineal, utilizando valores de antígeno prostático específico del año previo al diagnóstico. Se realizó un análisis multivariado de regresión logística para detectar variables asociadas a enfermedad extracapsular (EEC). Las variables asociadas a SLRB, SCR y SG fueron estudiadas mediante análisis de Kaplan-Meier (PSAV=3 vs. > 3ng/ml/año) y multivariado de regresión de Cox. La capacidad de PSAV para predecir SLRB, SCR y SG fue determinada mediante c-index.

Resultados

La mediana de seguimiento fue 56,16 meses (9,14–106,75). La mediana de PSAV fue 0,65 y 0,63ng/ml/año con los métodos aritmético y de regresión, respectivamente. Se detectó EEC en 74 casos (27,92%) y recidiva bioquímica en 50 (18,87%). Se observó mortalidad cáncer-relacionada en 4 pacientes (1,52%) y mortalidad global en 16 (6,08%). En el análisis multivariado, la PSAV no se relacionó con EEC, asociándose de forma independiente con la SLRB (RR: 1,06; IC 95%: 1,02–1,13; p=0,008), SCR (RR: 1,22; IC 95%: 1,00–1,50; p=0,048) y SG (RR: 1,35; IC 95%: 1,18–1,55; p<0,001).

Conclusiones

La PSAV es una variable preoperatoria que predice SLRB, SCR y SG en los pacientes tratados mediante PR. No se observa asociación entre PSAV y la presencia de EEC.

Palabras clave:
Cáncer de próstata
Prostatectomía radical
Velocidad de antígeno prostático
específico
Recidiva bioquímica
Enfermedad extracapsular
Supervivencia

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