Surgical treatment of spontaneous anterior interosseous nerve palsy: A comparison between minimal incision surgery and wide incision surgery

Kensuke Ochi, Yukio Horiuchi, Kenichi Tazaki, Shinichiro Takayama, Takashi Matsumura

Research output: Contribution to journalArticle

4 Citations (Scopus)


Recent reports have suggested that fascicular constriction located proximal to the elbow may be the primary aetiology of spontaneous anterior interosseous nerve palsy (sAINP), and recommended interfascicular neurolysis ranging from the proximal forearm to distal upper arm (wide incision surgery: WIS) for its treatment. On the basis of these reports, it was hypothesised that, if the aetiology of sAINP was fascicular constriction, neurolysis limited proximal to the elbow (minimal incision surgery: MIS) should have similar results to those of WIS. Twenty-five surgically treated sAINP cases were retrospectively evaluated. The mean age of onset was 42.8 years, the mean preoperative period was 5.3 months, and mean follow-up period after operation was 31 months. Eleven patients underwent MIS, while 14 underwent WIS according to the patient's intention (intention-to-treat). Twenty-one patients had fascicular constriction, and no entrapment neuropathy was seen in this series. At the latest follow-up, 82% of the patients had British Medical Research Council grade of ≥4 in flexor-pollicis-longus, while 80% had grade of ≥4 in flexor-digitorum- profundus-of-the-index-finger. There were no significant differences between the results of either group. These result suggested that the aetiology of sAINP may not be external compression, but fascicular constriction, and MIS may be its favourable surgical treatment.

Original languageEnglish
Pages (from-to)213-218
Number of pages6
JournalJournal of Plastic Surgery and Hand Surgery
Issue number3
Publication statusPublished - 2013 Jun 1



  • Anterior interosseous nerve palsy
  • Anterior interosseous nerve syndrome
  • Compression neuropathy
  • Fascicular constriction
  • Fascicular torsion
  • Idiopathic
  • Interfascicular neurolysis
  • Median nerve palsy
  • Minimal invasive surgery
  • Spontaneous anterior interosseous nerve palsy

ASJC Scopus subject areas

  • Surgery

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