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Dorsal to base of 5th metacarpal

The extensor tendons are retracted radially together with the surrounding loose connective tissue.  The dorsal sensory branch ..

Retract extensor tendons

The extensor tendons are retracted radially together with the surrounding loose connective tissue.
The dorsal sensory branch of the ulnar nerve is retracted to the ulnar side, possibly together with the extensor carpi ulnaris tendon.