No man's land refers to which flexor tendon zone?

• A. Zone I
• B. Zone III
• C. Zone IV
• D. Zone II

Answer: (D)

No man's land is the middle segment of the finger flexor tendon system, specifically the portion from where the flexor digitorum superficialis inserts on the middle phalanx up to the proximal edge of the A1 pulley. This area is crowded with both the superficialis and profundus tendons inside a tight fibrous sheath, so injuries here historically have a high risk of adhesions and restricted tendon glide, making healing and restoration of motion more challenging. That is why this region is identified as the zone most associated with no man's land. The other zones refer to different parts of the flexor tendon pathway (distal to the FDS insertion, within the carpal tunnel and palm, or forearm), which have distinct implications for injury and treatment.