Relationship Between Intraprostatic Urethral Sphincter Status and Prostate Volume as Revealed by Magnetic Resonance Imaging

Our results may indicate that the proximal length, which is covered by the adenoma, becomes longer as prostate hyperplasia progresses, whereas the distal length does not. It may be important to preserve the intraprostatic length of the striated sphincter when the urethra is dissected at the apex during radical prostatectomy.