Pronation Contracture of the Forearm due to Iatrogenic Scar Formation of the Distal Membranous Part of the Forearm Interosseous Membrane

Author(s): Okamoto S, Nakamura T, Yamabe E, Takayama S, Toyama Y

Source: J Hand Surg 31B:397-400, 2006.


The authors reported the case of a 33-year old woman who developed a forearm contracture with loss of supination after resection of a distal forearm hemangioma and adjacent pronator quadratus muscle.  An MRI study demonstrated scar formation in the distal membranous portion of the interosseous membrane.  Forearm rotation was restored after excision of the scar tissue: motion was maintained for 5-years of follow-up.

The etiology of a forearm contracture is often difficult to define.  Contributing factors may include ectopic bone formation (mechanical limitation), forearm malunion, contracture of the distal and/or proximal radioulnar joints, and contracture of the interosseous membrane.  In addition, secondary changes can occur in these areas.  As such, treating the suspected cause (e.g., excision of ectopic bone) does not always restore normal forearm motion.  Patients should be counseled accordingly.  This report discusses the successful surgical release of an interosseous ligament contracture.


Forearm, Rotation, Contracture, Release, Interosseous

Related Links
Journal of Hand Surgery