causes of abnormal lunate signal on MRI
Ulnar
impaction syndrome • Ulnar impaction syndrome - Ganzer Fall bei Radiopaedia
Kienböck
disease • Kienbock disease - Ganzer Fall bei Radiopaedia
There are several important causes of an abnormal lunate signal on MRI, the most frequent causes being Kienbock disease (25%), ulnar impaction syndrome (25%) and intraosseous ganglia (20%).Appreciation of the pattern of bone signal change can often allow the correct diagnosis to be made.
- Kienbock disease
- sclerosis (low T1 and T2) centrally and within the radial aspect of lunate
- sclerosis can be diffuse
- bone edema (high T2, intermediate T1) may be seen in the acute phase, particularly on the radial side
- 75% of cases are associated with negative ulnar variance
- ulnar impaction syndrome
- sclerosis (low T1 and T2) localized to the proximal ulnar aspect of lunate
- bone edema (high T2, intermediate T1)
- chondromalacia of distal ulnar and proximal lunate cartilage
- commonly associated with positive ulnar variance
- intraosseous ganglia
- round T2 hyperintense regions
- usually radial side of the lunate or distal lunate
- lunate fracture
- diffuse bone edema (high T2, intermediate T1)
- linear fracture line (low T1 and T2)
- others
- degenerative disease
- inflammatory disease
- Infantile and juvenile lunatomalacia
- complex regional pain syndrome
Siehe auch:
Assoziationen und Differentialdiagnosen zu causes of abnormal lunate signal on MRI:
