Since its advent in 2001, robotic-assisted laparoscopic prostatectomy has become the gold standard treatment for the management of localized prostate cancer.

Pelvic lymphocoele is most commonly found after gynecological or renal transplant surgery or following extensive pelvic lymphadenectomy. Its formation following prostatectomy is not uncommon<sup>1Sogani P.C., Watson R.C., Whitmore Jr. Lymphocele after pelvic lymphadenectomy for urologic cancer Urology 1981 ;  17 : 39-43 [cross-ref]

Cliquez ici pour aller à la section Références</sup> but it seldom causes major complications or morbidity.<sup>2Hazir B., et al. An unusual localization of seven months delayed pelvic lymphocele following radical retropubic prostatectomy: case report and literature review Int J Surg Case Rep 2018 ;  44 : 181-184 [cross-ref]

Cliquez ici pour aller à la section Références</sup>

We present a case of a 66-year-old man who presented with left-sided abdominal pain, a palpable infra-umbilical mass, and renal failure. He was initially presumed to have high pressure chronic retention however catheterization did not result in any improvement in his renal function. Further investigations revealed a large lymphocoele causing bilateral ureteric obstruction with resultant hydronephrosis.