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Dorsal to base of 5th metacarpal

The extensor tendons of the little finger converge slightly towards the center of the wrist joint.  The dorsal sensory branch ..

Surgical anatomy

The extensor tendons of the little finger converge slightly towards the center of the wrist joint.
The dorsal sensory branch of the ulnar nerve  and longitudinal veins must be protected.
The insertion of the extensor carpi ulnaris tendon is onto the ulnar side of the fifth metacarpal base.