The Journal of Hand Surgery

Dean G. Sotereanos, Donal M. McCarthy, Jeffrey D. Towers, Cynthia A. Britton, and James H. Herndon.


The pronator quadratus sign is associated with fractures of the distal radius and ulna and is believed to be due to accumulation of fluid within the pronator quadratus muscle. This anatomic study based on dye injection and x-ray film examination shows that the pronator quadratus occupies a distinct forearm space without intramuscular communication.