David Letterman Sign

(redirected from Scapholunate Dissociation)
A finding on a plain film of the wrist characterised by a marked widening (a gap of 3 mm or more) of the joint space between the scaphoid and lunate, which is seen in patients with rotatory subluxation of the scaphoid (scapholunate dislocation). Untreated, the subluxation is associated with chronic wrist pain and disability. The widened space has been fancifully likened to the dental diastema (gap teeth) of American talk show host David Letterman, as well as American model Lauren Hutton and British comedian Terry Thomas, for whom it was originally named
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Lauren, 20th century U.S. model and film actress.
Lauren Hutton sign - Synonym(s): David Letterman sign


David, 20th century U.S. late-night television host.
David Letterman sign - on plain film of the wrist, subluxation of scaphoid bone resulting in widening of space between scaphoid and lunate carpal bones; so called because it is similar to prominent gap between central front teeth in this television personality. Synonym(s): Lauren Hutton sign; Terry Thomas sign


Terry, 20th century English comedic film actor.
Terry Thomas sign - Synonym(s): David Letterman sign
Medical Eponyms © Farlex 2012
References in periodicals archive ?
This scapholunate dissociation is the first stage of Mayfield et al.'s classification.
INTRODUCTION: The Scapholunate dissociation is an injury to ligaments in the wrist that can lead to loosening of carpal bones.
Scapholunate advanced collapse (SLAC) is a type of arthritis related to scapholunate dissociation. Wrick JD et al performed proximal row carpectomy for SLAC and were successful in preserving joint motion1.
Our case of scapholunate dissociation was an isolated entity.
On PA view it was differentiated from scapholunate dissociation where there was widening of space between lunate and scaphoid.
Also, static scapholunate dissociation with signs of mild arthritis was obvious (Figure 2a & 2b).
Also, a combined scaphoid fracture and scapholunate dissociation may be seen in these devastating injuries (6).
Tang and associates (36) reported on 20 of 424 consecutive patients with fractures of the distal radius who presented with evidence of scapholunate dissociation on radiographs and traction-view fluoroscopy.
Can cast immobilization successfully treat scapholunate dissociation associated with distal radius fractures?
Watson and coworkers found that 95% of all degenerative changes are centered around the scaphoid, mostly due to late sequelae of scapholunate dissociation or chronic scaphoid nonunion, termed SLAC (scapholunate advanced collapse) and SNAC (scaphoid nonunion advanced collapse) wrist.
Untreated scapholunate dissociation with a hyperflexed position of the scaphoid gives rise to cartilage degeneration between the joint surfaces of the dorsal radius and the scaphoid, equivalent to a stage II SNAC wrist.
(23.) Vance RH, Gelberman RH, Braun RM: Chronic bilateral scapholunate dissociation without symptoms.