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Acta ortopédica mexicana

versión impresa ISSN 2306-4102


DOMINGUEZ-GASCA, LG; MAGANA-REYES, J; ALVAREZ-RODRIGUEZ, M  y  DOMINGUEZ-CARRILLO, LG. Injury of the anterior branch of the posterior interosseous nerve. Acta ortop. mex [online]. 2019, vol.33, n.2, pp.123-126.  Epub 28-Mayo-2021. ISSN 2306-4102.


Posterior interosseous nerve syndrome, a branch of the radial nerve at the level of the forearm, is characterized by the motor function loss of some or all of the muscles innervated distally.

Clinical case:

A 26-year-old male with a history of proximal radius fracture associated to radial nerve injury, treated with osteosynthesis 7 years earlier, with full recovery, who currently presented intense pain 4 cm distal to the radial head, accompanied by paralysis of Extensor pollicis longus , Extesnor pollicis brevis and Abductor pollicis longus, with paresis of the Extensor indicis propius , in which a diagnosis of entrapment syndrome of the anterior descending branch of the posterior interosseous nerve (SNIP) was performed.


The conservative management of SNIP is indicated during the first 8-12 weeks, if no improvement is found, the indication for surgical exploration is indicated, and the removal of osteosynthesis material is controversial.

Palabras llave : Posterior interosseous nerve; paralysis; complication; surgery; fracture.

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