Via Smithsonian:
... For one thing, Dryptosaurus had relatively big hands. Although this dinosaur, like other tyrannosaurs of the Late Cretaceous, had relatively short arms, the known finger elements of Dryptosaurus are very long and, in terms of proportions, more closely resemble their counterparts in early, big-handed tyrannosauroids. Dryptosaurus may have had the novel combination of short arms with big hands, and two inferences can be drawn from this...