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Anatomical Science International

, Volume 93, Issue 4, pp 559–562 | Cite as

The middle rectal artery arising from the lateral sacral artery

  • Satoru HonmaEmail author
  • Takahiro Sonomura
Case Report
  • 158 Downloads

Abstract

A middle rectal artery arising from the lateral sacral artery (MRAls) in the right pelvis of a 99-year-old male was observed. Although variations of the origin of the middle rectal artery have been reported on many occasions, there are few descriptions of the trajectory in the literature. In our case, the MRAls branched from the lateral sacral artery on the sacral surface close to the third sacral sympathetic ganglion and immediately penetrated the third sacral splanchnic nerve and the parasympathetic pelvic splanchnic nerve from the ventral ramus of the forth sacral nerve. The MRAls entered in the lateral wall of the rectal ampulla without giving off a prostatic branch. Preservation of the pelvic autonomic nerves are crucial in rectal cancer excision to preserve the autonomic functions. The close topography of the MRAls to the origin of the fine autonomic nerves should be noted.

Keywords

Arterial variation Autonomic nerves Lateral sacral artery Middle rectal artery Pelvic plexus 

Notes

Acknowledgements

This study is supported by Grants-in-Aid from the Japan Society for the Promotion of Science #26350592.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Japanese Association of Anatomists 2018

Authors and Affiliations

  1. 1.Department of Anatomy, School of MedicineKanazawa Medical UniversityKahokuJapan
  2. 2.Department of Oral AnatomyAsahi University School of DentistryMizuhoJapan

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