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

Hutton,

Lauren, 20th century U.S. model and film actress.
Lauren Hutton sign - Synonym(s): David Letterman sign

Letterman,

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

Thomas,

Terry, 20th century English comedic film actor.
Terry Thomas sign - Synonym(s): David Letterman sign
References in periodicals archive ?
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.
Based on our experience with more than 900 cases, midcarpal arthrodesis with complete excision of the scaphoid appears to be a reliable method for managing wrist arthritis due to scapholunate dissociation (SLAC wrist) and scaphoid nonunion (SNAC).