Scaphoid non-union advanced collapse
Updates to Article Attributes
Body
was changed:
A scaphoid non union advanced collapse (or SNAC wrist) is complication that can occur with a scaphoid fracture.
Pathology
In a SNAC wrist, the proximal scaphoid fragment usually remains attached to the lunate (which rotate together during extension), while the distal scaphoid fragment rotates into flexion. This results in abnormal contact in the radioscaphoid compartment, characterized by early styloid osteoarthritis between the distal scaphoid fragment and the radial styloid process.
Radiographic features
Radiographic signs will depend on the stages of osteoarthritis in a SNAC wrist
- stage 1: osteoarthritis between the distal scaphoid fragment and the radial styloid process
- stage 2: same as stage 1 with the addition of osteoarthritis between the scaphoid and the capitate.
-
stage 3:
- osteoarthritis affecting the radial styloid, distal scaphoid, and scaphocapitate with progression to the lunocapitate
- there is lateral proximal radial migration of the capitate dorsal to the lunate, which is a DISI configuration
- this is followed by non-articulation between the capitate and radius
See also
-<strong>stage 1</strong> : osteoarthritis between the distal scaphoid fragment and the radial styloid process</li>- +<strong>stage 1</strong>: osteoarthritis between the distal scaphoid fragment and the radial styloid process</li>
-<strong>stage 2 </strong>: same as stage 1 with the addition of osteoarthritis between the scaphoid and the capitate.</li>- +<strong>stage 2</strong>: same as stage 1 with the addition of osteoarthritis between the scaphoid and the capitate.</li>
-<strong>stage 3</strong> :<ul>- +<strong>stage 3</strong>:<ul>
References changed:
- 2. Tomaino MM, Miller RJ, Cole I et-al. Scapholunate advanced collapse wrist: proximal row carpectomy or limited wrist arthrodesis with scaphoid excision?. J Hand Surg Am. 1994;19 (1): 134-42. <a href="http://dx.doi.org/10.1016/0363-5023(94)90237-2">doi:10.1016/0363-5023(94)90237-2</a> - <a href="http://www.ncbi.nlm.nih.gov/pubmed/8169358">Pubmed citation</a><span class="auto"></span>
- 3. Strauch RJ. Scapholunate advanced collapse and scaphoid nonunion advanced collapse arthritis-update on evaluation and treatment. J Hand Surg Am. 2011;36 (4): 729-35. <a href="http://dx.doi.org/10.1016/j.jhsa.2011.01.018">doi:10.1016/j.jhsa.2011.01.018</a> - <a href="http://www.ncbi.nlm.nih.gov/pubmed/21463735">Pubmed citation</a><span class="auto"></span>
- 1. Vender MI, Watson HK, Wiener BD et-al. Degenerative change in symptomatic scaphoid nonunion. J Hand Surg Am. 1987;12 (4): 514-9. <a href="http://www.ncbi.nlm.nih.gov/pubmed/3611645">Pubmed citation</a><span class="auto"></span>
- 1. Vender MI, Watson HK, Wiener BD et-al. Degenerative change in symptomatic scaphoid nonunion. J Hand Surg Am. 1987;12 (4): 514-9. <a href="http://www.ncbi.nlm.nih.gov/pubmed/3611645">Pubmed citation</a><span class="auto"></span>
- 1. Vender MI, Watson HK, Wiener BD, Black DM. Degenerative change in symptomatic scaphoid nonunion. J Hand Surg [Am] 1987; 12-A:514-9.1.
- 1`. Vender MI, Watson HK, Wiener BD et-al. Degenerative change in symptomatic scaphoid nonunion. J Hand Surg Am. 1987;12 (4): 514-9. <a href="http://www.ncbi.nlm.nih.gov/pubmed/3611645">Pubmed citation</a><span class="auto"></span>
Images Changes:
Image 3 MRI (T1) ( create )
Unable to process the form. Check for errors and try again.