Piece of pie sign (wrist)

Piece of pie

sign (wrist) • Tea cup and trivial pursuit - Ganzer Fall bei Radiopaedia

Dixon, A. Tea cup and trivial pursuit. Case study, Radiopaedia.org. (accessed on 03 Nov 2022) https://doi.org/10.53347/rID-18249 • CC by-nc-sa 3.0 (modified)

Piece of pie

sign (wrist) • Lunate dislocation - Ganzer Fall bei Radiopaedia

Akram, N. Lunate dislocation. Case study, Radiopaedia.org. (accessed on 03 Nov 2022) https://doi.org/10.53347/rID-54530 • CC by-nc-sa 3.0 (modified)

Piece of pie

sign (wrist) • Gilula carpal arcs - Ganzer Fall bei Radiopaedia

Benoudina, S. Gilula carpal arcs. Case study, Radiopaedia.org. (accessed on 03 Nov 2022) https://doi.org/10.53347/rID-40715 • CC by-nc-sa 3.0 (modified)

Radiopaedia • CC-by-nc-sa 3.0 • de

The piece of pie sign refers to an abnormal triangular appearance of the lunate on a PA image of the wrist representing either lunate dislocation or perilunate dislocation . A lateral image will help differentiate whether there is lunate or perilunate dislocation, with lunate dislocation demonstrating a spilled teacup sign. This is largely due to disruption of Gilula arcs and disruption of the spaces between the proximal and distal carpal bones.