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Case description:

A 25 years old man presented with a laceration on radial side of proximal phalanx of 4th finger (zone II flexor) which was due to cut with glass.

Clinical findings:

The sheaths of Tendons of flexor digitorum sperficialis and profundus were not the same and each tendon had a separate sheath.

Treatment and outcome:

The tendons were reconstructed by modified Kessler sutures, after 15 months the patient had a 30 degrees of extension lag even after physiotherapy courses.

Clinical relevance:

This is the first reported of such normal variation in human hand tendon anatomy.

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Received 2014-10-31
Accepted 2015-12-01
Published 2015-12-30