What is the alternative name for the transpyloric plane?

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Transpyloric Plane Alternative Name

The transpyloric plane is also called Addison's plane.

Anatomical Definition and Location

The transpyloric plane is a horizontal anatomical landmark that:

  • Lies approximately at the level of the lower L1 to upper L2 vertebral bodies in most adults (75% of cases), based on modern CT imaging studies 1
  • Passes through the tip of the ninth rib laterally in approximately 60% of individuals 1
  • Is positioned midway between the jugular notch of the sternum and the pubic symphysis 1, 2

Clinical Significance and Anatomical Relationships

The transpyloric plane serves as a critical reference for locating multiple abdominal structures:

Vascular Structures

  • The superior mesenteric artery lies within this plane in 56% of cases 1
  • The portal vein formation is found at this level in 53% of individuals 1
  • These structures were confirmed to be within the transpyloric plane across all age groups in pediatric studies 3

Visceral Organs

  • The left renal hilum is located at this plane in 54% of cases, though the right renal hilum is typically positioned below it 1
  • The gallbladder fundus is more commonly found below the transpyloric plane rather than at it 1
  • The pylorus of the stomach (from which the plane derives its name) is variably positioned relative to this landmark 2

Important Clinical Caveats

Modern imaging studies reveal significant variability in the exact vertebral level and anatomical relationships of the transpyloric plane:

  • Age-related variations exist, with the transpyloric plane and associated structures positioned at higher vertebral levels in younger children 3
  • Ethnic differences may influence the precise location of this plane and its relationship to surrounding structures 2
  • Traditional cadaveric-based descriptions often differ from in vivo CT findings, emphasizing the need for updated anatomical references 1, 2

References

1
Research

Anatomical planes: are we teaching accurate surface anatomy?

Clinical anatomy (New York, N.Y.), 2012

3
Research

A reappraisal of pediatric abdominal surface anatomy.

Clinical anatomy (New York, N.Y.), 2022

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Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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