“Prostate size has no effect on continence or biochemical recurrence at 1 year after laparoscopic radical prostatectomy, but affects intra-operative blood loss, potency and surgical margins,” Aron et al write in the BJU International.
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The study points out what most people are concluding in regards to positive margins. Smaller prostate tend to have higher rates of positive margins. The results show that at 1 year the continence is similar, but the short term recovery of urinary function is not addressed. I think men with larger prostates take longer to regain urinary control.