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SLAC with "Terry Thomas Sign" on radiograph without and with power grip

SLAC with "Terry Thomas Sign" on radiograph without and with power grip
An A-P radiograph shows a scapholunate interval (arrow) greater than 4 mm ("Terry Thomas Sign"). Image B is an A-P view that shows widening of the SL interval (arrow) with the power grip.
A-P: anteroposterior; SLAC: scapholunate advanced collapse; SL: scapholunate.
Courtesy of Gregory Waryasz, MD.
Graphic 98728 Version 1.0