The transpyloric plane (also called the transpyloric line) is one of the surface reference lines used in surface anatomy. It is one of the lines used to describe the abdominal regions.

It is a horizontal or transverse plane located halfway between the jugular notch of the sternum, a depression in the superior aspect of the sternal manubrium, and the superior aspect of the symphysis pubis.

The transpyloric plane crosses the body of the first lumbar vertebra and approximates the course and location of the pancreas. The plane also transects the kidney horizontally in half at about the region of the renal hilum. This plane also passes through the origin of the superior mesenteric artery, the body of the gallbladder, and of course through the pylorus of the stomach, from whence the name of this plane arises.

To be precise, the pylorus will be found on or slightly above the transpyloric plane, and slightly to the right of the midline

Sources:

Sources:
1. "Clinical Anatomy" Brantigan, OC 1963 McGraw Hill
2. "Tratado de Anatomia Humana" Testut et Latarjet 8th Ed. 1931 Salvat Editores, Spain
3. Davis, Gwilym G. "Applied Anatomy: The Construction of the Human Body Considered in Relation to Its Functions, Diseases, and Injuries"; Philadelphia: J.B. Lippincott Co., 1910
Image modified from the original Davis, 1910