Potential for Posterior Interosseus Nerve Entrapment Suggests Exploration Is a Viable Option Following Distal Biceps Repair: A Case Report
Related Experiment Video
Updated: Mar 7, 2026
Author Spotlight: Ultrasound-Guided Needle Release Combined with Corticosteroid Injection for the Treatment of Supinator Syndrome
Published on: May 26, 2023
Jason J McDonald1, Aaron Altas, George Economou
1Orthopedic Surgery, Huntington Hospital, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Huntington, New York.
Case:
A 34-year-old man developed weakness in finger extension following distal biceps repair, suggestive of posterior interosseus nerve (PIN) palsy. Surgical nerve exploration demonstrated direct PIN entrapment beneath the cortical button. Removal of the button resolved the patient's postoperative palsy.
Conclusion:
Precise placement of the cortical button is of utmost importance during repair of the distal biceps. Specifically, seating centered on the face of the bicipital tuberosity in line with the long axis of the radius will reduce the risk of PIN compression. If a PIN palsy should occur, surgical exploration and possible removal of the Endobutton should be considered.
