Which GB point is on the mid-axillary line in the fifth intercostal space, approximately 3 cun inferior to the apex of the axilla, at the level of the nipple?

• A. GB 20
• B. GB 21
• C. GB 22
• D. GB 23

Answer: (C)

The point is located on the side of the chest along the mid-axillary line in the fifth intercostal space, about three cun below the apex of the axilla and at the level of the nipple. This precise combination of location—mid-axillary line, fifth intercostal space, 3 cun down from the armpit’s apex, level with the nipple—matches the known position of GB 22. The other points are situated in different regions: one sits at the shoulder area, another is more anterior in the chest wall, and the remaining is not at the same lateral chest level. So the point that corresponds to that exact chest-wall position is GB 22.