Terry Thomas sign

a gap between the scaphoid and the lunate bones suggesting a rupture of the scapho-lunate ligament

seen on x-ray, CT and MRI of the wrist

Terry Thomas was a British actor whose career was most active in the sixties.

the reference is to the prominant gap between his front teeth

many radiologists have taken to calling it the "David Letterman" sign for similar reasons

Jon T. Lee, MD - 6 February 1995
Last updated: 1 October 2013