associated with [[Galeazzi fracture dislocation]] ![[Pasted image 20240831162747.png]] *Distal radioulnar joint dislocation* The ulna is dorsally displaced relative to the distal radius. This is not due to poor (rotated) positioning given that (1) the tip of the ulnar styloid (_arrow_) points posterior to the triquetrum (_large arrowhead_), which is abnormal and (2) the tip of the radial styloid is in line with the long axis of the distal radius (_black lines_), i.e., the view is correctly positioned. The pronator quadratus fat stripe is bowed forward and partly obliterated (_small arrowheads_). ## false positive example below is not a real DRUJ dislocation: ![[Pasted image 20240831162837.png| normal but incorrectly positioned (rotated) lateral view]] The ulna appears dorsally displaced relative to the radius mimick- ing a DRUJ dislocation. Signs that this is due to rotated positioning and not a DRUJ dislocation are (1) the tip of the ulnar styloid (_arrow_) “points” to the triquetrum (_large arrowhead_), as is normal and (2) the tip of the radial styloid is volar relative to the axis of the radius (_black lines_), i.e., the positioning is rotated. The pronator quadratus fat stripe is normal (_small arrowheads_)