The Male Rectourethralis and Deep Transverse Perineal Muscles and Their Relationship to Adjacent Structures Examined with Successive Slices of Celloidin-Embedded Pelvic Viscera

Zhai, Lili; Jin, Liu; Li, Yunsheng; Ma, Qing-Tong; Yin, Ping

doi:10.1016/j.eururo.2010.11.030

Cited by 23 publications

(51 citation statements)

References 25 publications

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“…Our present data show that the rectoperineal and rectourethral bundles as defined by Li and colleagues (Zhai et al. ) derive from the anterior extension of the longitudinal smooth muscle (Fig. A,E; cf.…”

Section: Discussionsupporting

confidence: 78%

“…The anterior portion of the muscle strand is known as the deep transverse perineal (Oelrich, ; Zhai et al. ) or rectourethral muscle (Brooks et al. ; Porzionato et al.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, however, Li and colleagues re‐introduced the deep transverse perineal muscle (Zhai et al. ). They reported that the medial fibers of the anterior extension of the longitudinal smooth muscle of the rectum ended at the perineal body, forming the rectoperineal muscle, whereas more lateral bundles (‘their’ rectourethral muscle) bypassed the perineal body to end at the posterior connective tissue of the penile bulb.…”

Section: Discussionmentioning

confidence: 99%

“…They then described the deep transverse perineal muscle as a third, yet more lateral muscle bundle (Zhai et al. ). Our present data show that the rectoperineal and rectourethral bundles as defined by Li and colleagues (Zhai et al.…”

Section: Discussionmentioning

confidence: 99%

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Architecture of structures in the urogenital triangle of young adult males; comparison with females

Dabhoiwala

Hagoort

et al. 2018

Journal of Anatomy

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The fibro‐muscular architecture of the urogenital triangle remains contentious. Reasons are small size of the constituting structures and poor visibility with most imaging methods. We reinvestigated the area in serial sections of three males (21–38 years old) of the American and Chinese Visible Human Projects and two 26‐week‐old male fetuses, and compared the findings with earlier observations in females. The mass of the levator ani muscle was approximately twofold smaller and its funnel shape steeper in males than females. In the levator hiatus, a strand of the smooth longitudinal muscle layer of the rectum, the ‘rectourethral (RU) muscle’, extended anteriorly from the anorectal bend to the penile bulb. Fibrous tissue that formed in the inferior reach of the fetal RU muscle identified the location of the developing perineal body (PB) and divided the muscle into posterior ‘rectoperineal’ and anterior ‘deep perineal’ portions. In males, the PB remained small and bipartite, so that the RU muscle presented as an undivided midline structure. The well‐developed female PB, instead, intertwined with the deep perineal muscle and both structures passed the vagina bilaterally to form the perineal membrane in the posterior portion of the urogenital triangle. The urethral rhabdosphincter extended in the anterior portion of the urogenital triangle between the penile bulb inferiorly and the bladder neck superiorly, and consisted of a well‐developed circular ‘membranous’ portion with bilateral posteroinferior ‘wings’ and a thinner ‘prostatic’ portion on the prostate anterior side. In men, muscles occupy the urogenital triangle, but additional tightening of the locally fibrous adipose tissue by the superficial transverse perineal muscle appears necessary to generate functional support in women. An interactive 3D pdf file with these anatomical details (available online) should allow more accurate interpretation of ultrasound, computed tomography and magnetic resonance images.

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Section: Discussionsupporting

confidence: 78%

“…The anterior portion of the muscle strand is known as the deep transverse perineal (Oelrich, ; Zhai et al. ) or rectourethral muscle (Brooks et al. ; Porzionato et al.…”

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Architecture of structures in the urogenital triangle of young adult males; comparison with females

Dabhoiwala

Hagoort

et al. 2018

Journal of Anatomy

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“…The posterior aspect of the prostate and their relationship has been mostly described . We demonstrated a tendinous dorsal raphe in the posterolateral aspect of the prostate representing an important stabilization structure of the urethra.…”

Section: Discussionmentioning

confidence: 63%

The fascial suspension of the prostate: A cadaveric study

Dalpiaz

Anderhuber

2016

Neurourology and Urodynamics

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Spatial distribution of smooth muscle tissue in the male pelvic floor with special reference to the lateral extent of the rectourethralis muscle: Application to prostatectomy and proctectomy

et al. 2018

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The anatomy of the rectourethralis muscle is essential for performing radical prostatectomy and proctectomy. The rectourethralis muscle is known to continue to the rectal wall posteriorly and to the membranous urethra anteriorly. However, the lateral extent of the rectourethralis muscle remains unclear. This study aimed to verify the hypothesis that the rectourethralis muscle laterally extends and directly adheres to the levator ani. Eight male cadavers were used for macroscopic dissection, and three male cadavers were used for immunohistological analysis using anti-smooth muscle and anti-skeletal muscle antibodies. The rectourethralis muscle laterally extended smooth muscle fibers both superoposteriorly and inferoanteriorly toward the levator ani. The smooth muscle fibers sandwiched the levator ani superoanteriorly and inferoanteriorly. A few smooth muscle fibers of the rectourethralis muscle inserted into the levator ani. This study clarified the spatial distribution of the rectourethralis muscle and its detailed positional relationship with the levator ani. The findings are valuable especially to urologists and anorectal surgeons for dissecting an optimal layer around the urethra and the rectum, and for avoiding rectal or urethral injuries during surgery. Clin. Anat., 2018. © 2018 Wiley Periodicals, Inc.

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The Male Rectourethralis and Deep Transverse Perineal Muscles and Their Relationship to Adjacent Structures Examined with Successive Slices of Celloidin-Embedded Pelvic Viscera

Cited by 23 publications

References 25 publications

Architecture of structures in the urogenital triangle of young adult males; comparison with females

Architecture of structures in the urogenital triangle of young adult males; comparison with females

The fascial suspension of the prostate: A cadaveric study

Spatial distribution of smooth muscle tissue in the male pelvic floor with special reference to the lateral extent of the rectourethralis muscle: Application to prostatectomy and proctectomy

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