Which point is on the medial side of the lower leg, 3 cun superior to Sānyīnjiāo SP-6, in a depression just posterior to the medial crest of the tibia?

• A. SP 7
• B. SP 6
• C. SP 5
• D. SP 9

Answer: (A)

Locating this point hinges on using a clear line along the spleen channel and reliable bony landmarks on the leg. The spleen channel runs along the medial side of the lower leg, and Sānyīnjiāo (SP-6) sits about 3 cun above the medial malleolus, just posterior to the tibia. From SP-6, moving 3 cun upward along the same line brings you to a small hollow behind the medial crest of the tibia. That depression is the location of SP-7. This specific combination—the medial leg location, the measured distance above SP-6, and the depression just behind the tibial crest—is what identifies SP-7. The other points would align with different landmarks or lie in different regions along the leg, so this precise landmarking uniquely matches SP-7.