Which SI point is 3 cun lateral to the lower border of the spinous process of T1 (Táodào DU-13)?

• A. SI 14
• B. SI 13
• C. SI 12
• D. SI 11

Answer: (B)

The back-scapular region contains several Small Intestine points described by how far they are from the midline and from spinal landmarks. 3 cun lateral to the lower border of the spinous process of T1 places you on the scapular area where SI13 lies. That specific location—on the medial aspect of the scapular region, about three cun from the midline at the level of T1—matches SI13, making it the correct choice. The other points are situated at different vertical positions along the scapular area, so they do not correspond to this exact landmark.