Turkish Neurosurgery 2021 , Vol 31 , Num 5
Posterior Interosseous Nerve Injury After a Fracture of Ulna and Radius: A Case Report
Shilu SHRESTHA1,Vojtech KUNC2,Ariel C WOO4
1National Trauma Center, Department of Orthopedics and Trauma, Mahankal, Kathmandu, Nepal
2Charles University, Second Faculty of Medicine, Department of Anatomy, Prague, Czech Republic
3Masaryk Hospital, Clinic of Traumatology, Ustí nad Labem, Czech Republic
4Tan Tock Seng Hospital, Department of General Surgery, Singapore, Republic of Singapore
DOI : 10.5137/1019-5149.JTN.32693-20.1 The aim of this study is present a case of isolated injury to the branch of posterior interosseous nerve.

A 27-year-old gentleman was presented with an inability to extend the ulnar three fingers of his left hand after sustaining closed fractures of the left ulna and radius after a motorbicycle accident. The patient recovered partially over the course of 3 months but continues to be functionally compromised by the persistent radial deviation of his left wrist and incomplete mobility of the ulnar 3 fingers upon extension. On second exploration, we found the denervated muscles supplied by the recurrent branch of posterior interosseous nerve. Tendon transfer was performed with good clinical outcome at 12 months.

This is a rare case of isolated injury to branch of posterior interosseous nerve. This generates the suspicion of possibility of PIN or its branch injury even in closed fractures of the forearm. In addition, this highlights the importance of interval generation during the fracture fixation to prevent the possibility of iatrogenic injury to branches of PIN. Keywords : Posterior interosseous nerve, Peripheral nerve palsy, Ulna fracture, Radius fracture

Corresponding author : Shilu SHRESTHA, drshilu131@gmail.com