Which point lies at the supraclavicular area, posterior to the superior border of the clavicle and at its midpoint, 4 cun lateral to the midline on the mamillary line?

Which point lies at the supraclavicular area, posterior to the superior border of the clavicle and at its midpoint, 4 cun lateral to the midline on the mamillary line?

• A. ST 11
• B. ST 12
• C. ST 10
• D. ST 13

Answer: (B)

Understanding how to read point locations is about combining landmarks with cun measurements. The supraclavicular area is the hollow just above the clavicle, behind its upper border. The description places the point at the midpoint of the clavicle, behind the clavicle, and then specifies a horizontal position 4 cun lateral to the midline on the mamillary line (the nipple line). That exact combination locates ST12 in the supraclavicular fossa, behind the clavicle. The other points listed are in different chest/neck regions and do not sit in that supraclavicular pocket, so they don’t match the described location. Therefore, the described position corresponds to ST12.

Understanding how to read point locations is about combining landmarks with cun measurements. The supraclavicular area is the hollow just above the clavicle, behind its upper border. The description places the point at the midpoint of the clavicle, behind the clavicle, and then specifies a horizontal position 4 cun lateral to the midline on the mamillary line (the nipple line). That exact combination locates ST12 in the supraclavicular fossa, behind the clavicle.

The other points listed are in different chest/neck regions and do not sit in that supraclavicular pocket, so they don’t match the described location. Therefore, the described position corresponds to ST12.