"Perilunate dislocations typically occur in young adults with high energy trauma resulting in the loading of a hyperextended, ulnarly deviated hand. Around 60% of perilunate dislocations are associated with a scaphoid fracture which is then termed a trans-scaphoid perilunate dislocation. The other types are perilunate, trans-radial styloid and trans-scaphoid trans-capitate perilunar."
"Perilunate dislocations typically occur in young adults with high energy trauma resulting in the loading of a hyperextended, ulnarly deviated hand. Around 60% of perilunate dislocations are associated with a scaphoid fracture which is then termed a trans-scaphoid perilunate dislocation. The other types are perilunate, trans-radial styloid and trans-scaphoid trans-capitate perilunar."
"Radiographic features "
"Despite treatment, the long-term risk of degenerative arthritis is high (~60%). Dissociative and non-dissociative carpal instability can occur with DISI or VISI pattern. Also, there is a higher rate of nonunion of scaphoid fractures when associated with perilunate dislocation than with isolated scaphoid fractures. Proximal row carpectomy or wrist arthrodesis procedures can be considered for chronic cases."
"Perilunate dislocations typically occur in young adults with high energy trauma resulting in the loading of a hyperextended, ulnarly deviated hand. Around 60% of perilunate dislocations are associated with a scaphoid fracture which is then termed a trans-scaphoid perilunate dislocation. The other types are perilunate, trans-radial styloid and trans-scaphoid trans-capitate perilunar."
"Perilunate dislocation involves traumatic rupture of the radioscaphocapitate, scapholunate interosseous and lunotriquetral interosseous ligaments. Mayfield et. al. have proposed a four-stage process to describe perilunar wrist instability (see carpal dislocation) where perilunate dislocation represents stage 2 2."
"PA radiograph"
"The most important differential diagnosis is that of a lunate dislocation which can mimic a perilunate dislocation, especially on AP projection. The key to not confusing the two is the lateral projection:"
Expected headings
"Mechanism"
"Radiographic features "
"Plain radiograph"
"Report checklist"
"CT"
"Plain film is normally sufficient to diagnose the dislocation (assuming there is no interpretation error), however, CT plays an important role in assessing for associated occult fractures; the most common and important being scaphoid fracture."