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Vol. 38. Issue 2.
Pages 84-89 (March 2014)
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Vol. 38. Issue 2.
Pages 84-89 (March 2014)
Original article
Incidence of positive surgical margins after robotic assisted radical prostatectomy: Does the surgeon's experience have an influence on all pathological stages?
La incidencia de márgenes quirúrgicos positivos tras prostatectomía radical asistida por robot: ¿tiene la experiencia del cirujano influencia en todos los estadios patológicos?
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A.W. Villamil, J.I. Costabel, N. Billordo Peres
Corresponding author
nicolas.billordo@hiba.org.ar

Corresponding author.
, P.F. Martínez, C.R. Giudice, O.H. Damia
Departamento de Urología, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
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Tables (6)
Table 1. Preoperative variables.
Table 2. Intra-operative variable.
Table 3. Postoperative variables.
Table 4. Patients according to local extension.
Table 5. PSM in ≤pT2c.
Table 6. PSM in ≥pT3.
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Abstract
Objective

The aim of this study is to analyze the clinical and surgical features of patients who underwent robotic-assisted radical prostatectomy (RARP) at our institution, and the impact of the surgeon's experience in the oncological results related to pathological stage.

Material and methods

An analysis of 300 RARP consecutively performed by the same urologist was conducted. Patients were divided into 3 groups of 100 patients in chronological order, according to surgery date. All patients had organ-confined clinical stage. Variables which could impact in positive margins rates were analyzed. Finally, positive surgical margins (PSM) in regard to pathological stage and surgeon's experience were compared and analyzed.

Results

No significant differences were found in variables which could impact in PSM rates. The overall PSM rate was 21%, with 28% in the first group, 20% in the second, and 16% in the third (P=.108). Significant lineal decreasing tendency was observed (P=.024). In pT2 patients, the overall PSM rate was 16.6%, with 27%, 13.8%, and 7.3% in each group respectively (P=.009). A significant difference was found between group 1 and group 3 (P=.004). In pT3 patients, the surgeon's experience was not significantly associated with margin reductions with an overall PSM rate of 27.7% (28.2%, 28.6%, and 26.7% in each group respectively).

Conclusions

Clinical and surgical features in our patients did not vary over time. We found a significant reduction of PSM related to surgeon's experience in pT2 patients. Contrariwise, the margin status remained stable despite increasing experience in pT3 patients.

Keywords:
Prostate cancer
Robotic-assisted radical prostatectomy
Learning curve
Positive surgical margins
Resumen
Objetivo

Analizar las características clínico-quirúrgicas de 300 pacientes con cáncer de próstata operados con cirugía robótica y el impacto de la experiencia del cirujano en los resultados oncológicos.

Material y métodos

Se realizó un análisis retrospectivo de 300 prostatectomías radicales asistidas con robot realizadas todas por el mismo cirujano. Se dividieron los pacientes en 3 grupos de 100 en orden cronológico, de acuerdo a fecha de la cirugía. Todos los pacientes presentaban estadio clínico órgano-confinado. Ningún paciente recibió hormonobloqueo neoadyuvante. Se analizan en cada grupo las variables que, a priori, impactarían en la presencia de márgenes quirúrgicos positivos (MQP). Finalmente se subdividió cada grupo en pacientes con enfermedad órgano-confinada y pacientes con enfermedad extraprostática y se analizaron los MQP.

Resultados

Los grupos fueron homogéneos entre sí. La incidencia de pT2 y pT3 o más fue similar entre grupos (p=0,691). La incidencia global de MQP fue del 21%, 28% en el primer grupo, del 20% en el segundo grupo y del 16% en el tercer grupo (p=0,108). Se observó una tendencia de descenso lineal significativa (p=0,024). En pacientes pT2 la incidencia global de MQP fue de 16,6%, con un descenso significativo entre los grupos (p=0,009). La diferencia significativa fue hallada entre el grupo 1 y el grupo 3 (p=0,004). En pacientes pT3 o más la incidencia global de MQP fue del 27,7% sin evidencia de descenso significativo (p=0,978).

Conclusiones

Hemos encontrado una reducción significativa de los MQP relacionados con la experiencia del cirujano para los pacientes con enfermedad órgano-confinada, y no así para los pacientes pT3.

Palabras clave:
Cáncer de próstata
Prostatectomía radical asistida con tecnología robótica
Curva de aprendizaje
Márgenes quirúrgicos positivos

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