ABSTRACT
Objetivos. Analizar las diferencias entre la prostatectomía radical abierta (PRA) y la prostatectomía radical laparoscópica (PRL). Material y métodos. Se evalúan 180 cirugías prostáticas radicales realizadas en el 2004 y 2005, de las cuales 105 (58%) fueron laparoscópicas (PRL) y 75 (42%) por vía abierta. Más de la mitad de las intervenciones se realizaron por cirujanos expertos: 51% en las PRL y 56% en las PRA. Se compararon las variables: tiempo quirúrgico, sangrado intraoperatorio (diferencia entre hematocrito prequirúrgico y postquirúrgico) y los días de ingreso. El control oncológico y quirúrgico se evaluaron mediante los parámetros: margen maligno (MM) (margen positivo en un pT3) e incisión quirúrgica benigna (IQB) y maligna (IQM). Resultados. Los dos grupos son comparables respecto a la edad, estadio clínico, Gleason de la biopsia y volumen, sólo difiriendo en el valor de PSA. La media del tiempo quirúrgico fue significativamente mayor en la PRL (172 minutos) versus la PRA (145 minutos). La diferencia del hematocrito fue mayor en la PRA (10,7 puntos) respecto a la PRL (9,2 puntos) (p=0,03), así como los días de ingreso, representando un día más en la PRA (p=0,001). Un 26,7% de las PRL han presentado IQB, frente a un 48,7 % en las PRA (p=0,001). Desde el punto de vista oncológico se han observado un 5,4% de MM en las PRL versus un 16,9% en las PRA. (p=0,023). No obstante, no se han observado diferencias respecto a las IQM. Conclusión. En la PRL, a igualdad de estadio clínico y patológico, se observa un mejor control de los márgenes junto con una menor afectación quirúrgica de la pieza. También existe una menor pérdida sanguínea así como una reducción de los días de ingreso. Por tanto, se puede concluir que la PRL es, en nuestro entorno, una técnica válida para el tratamiento del cáncer de próstata organoconfinado, a pesar de un mayor tiempo quirúrgico (27 minutos) y de la dificultad de su aprendizaje
Introduction. To evaluate the differences between laparoscopic (LRP) and open radical prostatectomy (ORP). Material and Methods. From 2004 to 2005 180 Radical prostatectomies (RP) were performed, 105 laparoscopical and 75 by an open approach. Different urologists have acted as first surgeon; 51% of them, fully experienced ones in OPR, and 56% in LRP. Differences in operative time, estimated blood loss (difference of pre and post operative hematocrite), and duration of hospitalization were compared. Additionally, we have also analysed surgical and oncologic control of the specimen defined by the following variables: Malignant margins (MM) (positive margin in a pT3 specimen), and benign/malign surgical incision (BSI/MSI). Results. Groups were similar concerning age, clinical stage and Gleason score, and there are only differences in PSA. Mean operative time was significantly higher in LRP (172 minutes) versus ORP (145 minutes) (p<0.001). Difference of pre and post operative hematocrite was also higher in the open group (10.7 vs 9,2) (p=0.03), together with hospital stay, which was one day longer in the ORP group (p=0.001). ORP group had a higher rate of benign surgical incisions (48.7% vs 26.7%) (p=0.001). Regarding oncologic results, LRP presented a 5.4 % of positive margins, which compared significantly with a 16.9% rate in the open group (p=0.023). However, no differences concerning malignant surgical incisions were observed. Conclusion. With no differences in clinical and pathological stage, LRP offers a significant reduction of surgical aggressiveness on the specimen, together with a better MM control. We also observe a clear decrease in blood loss and hospital stay. Therefore, we conclude that LRP in our environment is a valid approach of surgical prostate cancer treatment in spite of a longer operative time (27 minutes) and a steep learning curve
Subject(s)
Male , Humans , Prostatectomy/methods , Laparoscopy/methods , Prostatic Neoplasms/surgery , Retrospective Studies , Prostate-Specific AntigenABSTRACT
OBJECTIVE: To analyze if free PSA percentage can help to predict a potential surgical failure (PSF) in patients undergoing radical prostatectomy. MATERIAL AND METHODS: Analysis of serum PSA concentration and free PSA percentage in 92 patients undergoing retropubic radical prostatectomy. In 38 cases, the carcinoma was organ-confined, 26 had capsule penetration, 20 had positive margins, 6 seminal vesicle invasion and 2 lymph nodes. PSF was demonstrated in 28 patients (30.4%) and in 64 (69.6%) the carcinoma was organ-confined. RESULTS: No significant relationship was found between PSA serum concentration or free PSA percentage to the pathological stage. The logistic regression analysis where the clinical status, Gleason sum, and free PSA percentage were included as predictive variables, showed that the latter was the only factor with capacity for PSF prediction. Over all, the probability of a carcinoma being confined in the surgical specimen when percentage of free PSA was greater than 10 was 83.8% and 60% when it was lower or equal, p < 0.03. However, the distribution was only significant when PSA concentration ranged between 4.1 and 10 ng/mL, p < 0.008. In this range of PSA, the relative risk of PSF was 5.5 (95% CI 1.4-21.8) when free PSA percentage was equal or lower than 10, the probability being 50% versus 9.1% when it was greater than 10. CONCLUSIONS: Free PSA percentage can help to predict PSF. PSA serum concentration lower than 10 ng/mL and free PSA percentage greater than 10 allows to detect a subgroup of patients with good prognosis and with less than 10% probability of having positive margins, seminal vesicles invasion or lymph nodes.
