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Prostate shape, external striated urethral sphincter and radical prostatectomy: the apical dissection
The Journal of Urology
|September 1, 1987
Summary
The external striated urethral sphincter extends from the penis to the bladder base. Its shape varies with the prostate apex, crucial for preserving continence during prostatectomy.
Area of Science:
- Anatomy
- Urology
Background:
- The external striated urethral sphincter (EUS) is vital for urinary continence.
- Understanding its anatomical variations is essential for surgical procedures.
Purpose of the Study:
- To reconfirm the anatomical extent of the EUS.
- To investigate the relationship between EUS configuration and prostatic apical shape.
- To inform surgical techniques for radical prostatectomy.
Main Methods:
- Anatomical dissection of 64 gross male pelvic specimens.
- Detailed examination of the external striated urethral sphincter and prostate apex morphology.
Main Results:
- The EUS extends as a single unit from the proximal penile urethra to the bladder base.
- EUS configuration is variable and correlates with prostatic apical shape, specifically the presence or absence of an anterior apical notch.
- Prostatic shapes are categorized based on lateral lobe development and anterior commissure position.
Conclusions:
- Knowledge of prostatic apical variations aids surgeons in optimizing urethral transection during radical prostatectomy.
- Preserving the EUS and associated continence tissues is facilitated by understanding these anatomical differences.