The retromalleolar compression test: a useful exploratory maneuver in the clinical evaluation of flexor hallucis longus rupture.

The clinical examination of ruptures of the flexor hallucis longus can be difficult, especially spontaneous defects that arise without a definitive history of trauma. Advanced imaging, in particular, magnetic resonance imaging, can be a useful adjunct to the clinical examination. However, we believe that a simple clinical maneuver can be used to reliably ascertain the presence of a rupture of the flexor hallucis longus.