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  • Title: Rotatory palmar subluxation of the lunate in post-traumatic ulnar carpal translocation.
    Author: Stäbler A, Baumeister RG, Szeimies U, Fink U, Berger H.
    Journal: Skeletal Radiol; 1994 Feb; 23(2):103-6. PubMed ID: 8191291.
    Abstract:
    Post-traumatic ulnar carpal translocation is a rare, severe ligamentous injury to the wrist. Radiologic findings include widening of the radiocarpal joint space at the radial styloid process and ulnar displacement of the carpus. Less than 50% of the lunate articulates with the radius in the neutral position; the lunate is tilted dorsally with palmar subluxation due to a ruptured radio-scapholunate (RSL) ligament. This malposition should be called rotatory palmar subluxation of the lunate (RPSL), by analogy to rotatory subluxation of the scaphoid (RSS). In contrast to dorsiflexed intercalated segment instability (DISI), in RPSL the RSL ligament is ruptured and, in the majority of cases, the scapholunate ligament remains intact. A prompt diagnosis should lead to successful treatment.
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