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Denonvilliers' fascia in men: a sheet plastination and confocal microscopy study of the prerectal space and the presence of an optimal anterior plane when mobilizing the rectum for cancer.
Colorectal Disease 2017 October 5
AIM: The aim of this study was to investigate the detailed, in situ, morphology of Denonvilliers fascia (DVF) in cadavers using sheet plastination and confocal microscopy and to review and describe the optimal anterior plane for mobilisation of the distal rectum..
METHOD: Six, male cadavers (age range, 46-87 years) were prepared as six sets of transverse (x2), coronal (x1) and sagittal (x3) plastinated sections which were examined under a confocal laser scanning microscope.
RESULTS: In this study a consistent space between the anterior rectal wall and the posterior surface of the prostate and seminal vesicles above the level of the perineal body was termed the prerectal space. Within that prerectal space we identified fibres which take their origin from the external urethral sphincter (EUS), together with others from the longitudinal rectal muscle (LRM) and the connective tissue sheaths of neurovascular bundles. Neither the EUS- nor the LRM-originated fibres were continuous with the endopelvic fascia;they are interposed laterally and cranially by multiple neurovascular bundles. Further, our results suggest that the peritoneum does not descend deep within the prerectal space.
CONCLUSION: This study reveals the undisturbed, in situ, structural detail of membrane-like structures in the prerectal space and confirms that the optimal plane for anterolateral mobilization of the rectum is posterior to the multilayered DVF. This article is protected by copyright. All rights reserved.
METHOD: Six, male cadavers (age range, 46-87 years) were prepared as six sets of transverse (x2), coronal (x1) and sagittal (x3) plastinated sections which were examined under a confocal laser scanning microscope.
RESULTS: In this study a consistent space between the anterior rectal wall and the posterior surface of the prostate and seminal vesicles above the level of the perineal body was termed the prerectal space. Within that prerectal space we identified fibres which take their origin from the external urethral sphincter (EUS), together with others from the longitudinal rectal muscle (LRM) and the connective tissue sheaths of neurovascular bundles. Neither the EUS- nor the LRM-originated fibres were continuous with the endopelvic fascia;they are interposed laterally and cranially by multiple neurovascular bundles. Further, our results suggest that the peritoneum does not descend deep within the prerectal space.
CONCLUSION: This study reveals the undisturbed, in situ, structural detail of membrane-like structures in the prerectal space and confirms that the optimal plane for anterolateral mobilization of the rectum is posterior to the multilayered DVF. This article is protected by copyright. All rights reserved.
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