Pseudo-anterior interosseous nerve syndrome by multiple intramuscular injection

Min Young Kim, Dong Hwee Kim, Byung Kyu Park, Baik Hyun Kim

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Blind intramuscular injection might cause severe neurovascular injury if it would be performed with insufficient knowledge of anatomy around the injection area. We report a case of pseudo-anterior interosseous syndrome caused by multiple intramuscular steroid injections around the antecubital area. The patient had weakness of the 1st to 3rd digits flexion with typical OK sign. Muscle atrophy was noted on the proximal medial forearm, and sensation was intact. The electrophysiologic studies showed anterior interosseous nerve compromise, accompanying with injury of the other muscles innervated by the median nerve proximal to anterior interosseous nerve. Magnetic resonance imaging of the left proximal forearm revealed abnormally increased signal intensity of the pronator teres, flexor carpi radialis, proximal portion of flexor digitorum superficialis, and flexor digitorum profundus innervated by the median nerve on the T2-weighted images. This case shows the importance of knowledge about anatomic structures in considering intramuscular injection.

Original languageEnglish
Pages (from-to)138-142
Number of pages5
JournalAnnals of Rehabilitation Medicine
Issue number1
Publication statusPublished - 2013 Feb
Externally publishedYes


  • Intramuscular injections
  • Pseudo-anterior interosseous nerve syndrome

ASJC Scopus subject areas

  • Rehabilitation


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