Irreducible palmar dislocation of the proximal interphalangeal joint caused by a fracture fragment: a case report.

We present a case of irreducible palmar dislocation of the proximal interphalangeal joint of the little finger caused by entrapment of a fracture fragment attached to the collateral ligament. The bony fragment was trapped between the radial condyle of the proximal phalanx and the volar plate. Reduction was easily accomplished by hooking out the fragment.