13 research outputs found
Athletic injuries of the extensor carpi ulnaris subsheath: MRI findings and utility of gadolinium-enhanced fat-saturated T1-weighted sequences with wrist pronation and supination
Purpose: To report the magnetic resonance imaging (MRI) findings in athletic
injuries of the extensor carpi ulnaris (ECU) subsheath, assessing the utility of
gadolinium-enhanced (Gd) fat-saturated (FS) T1-weighted sequences with wrist
pronation and supination.
Methods and Materials: Sixteen patients (13 males, 3 females; mean age 30.3
years) with athletic injuries of the ECU subsheath sustained between January 2003
and June 2009 were included in this retrospective study. Initial and follow‑up 1.5-T
wrist MRIs were performed with transverse T1-weighted and STIR sequences in
pronation, and Gd FS T1-weighted sequences with wrist pronation and supination.
Two radiologists assessed the type of injury (A to C), ECU tendon stability,
associated lesions and rated pulse sequences using a three-point scale: 1 = poor,
2 = good and 3 = excellent.
Results: Gd-enhanced FS T1-weighted transverse sequences in supination (2.63)
and pronation (2.56) were most valuable, compared with STIR (2.19) and T1
weighted (1.94). Nine type A, one type B and six type C injuries were found. There
were trends towards diminution in size, signal intensity and enhancement of associated
pouches on follow‑up MRI and tendon stabilisation within the ulnar groove.
Conclusion: Gd-enhanced FS T1-weighted sequences with wrist pronation and
supination are most valuable in assessing and follow‑up athletic injuries of the
ECU subsheath on 1.5-T MRI
Extensor carpi ulnaris (ECU) subsheath: Normal MRI appearance and findings in athletic injuries : 40
Purpose: First, to report ECU subsheath's normal MRI appearance
and the findings in athletic injuries. Second, to determine the best MRI
sequence for diagnosis.
Methods and materials: Sixteen patients (13 males, 3 females, mean
age 30.3 years) with ECU subsheath's athletic injuries sustained
between January 2003 and June 2009 were retrospectively reviewed.
Wrist MRI studies were performed on 1.5-T units and consisted of at
least transverse T1 and STIR sequences in pronation, and FS Gd T1
in pronation and supination. Two radiologists assessed the following
items, in consensus: injury type (A to C according to Inoue), ECU
tendon stability, and associated lesions (ulnar head oedema, extensor
retinaculum injury, ECU tendinosis and tenosynovitis). Then, each
reader independently rated the sequences' diagnostic value:
0 = questionable, 1 = suggestive, 2 = certain. Follow-up studies were
present in 8 patients. ECU subsheath's normal visibility (medial, central
and lateral parts) was retrospectively evaluated in 30 consecutive
control MRI studies.
Results: FS Gd T1 sequences in supination (1.63) and pronation (1.59)
were the most valuable for diagnosis, compared to STIR (1.22) and T1
(1). The study group included 9 type A, 1 type B and 6 type C injuries.
There were trends towards diminution in pouches' size, signal intensity
and enhancement in follow-up studies, along with tendon stabilization
within the ulnar groove. In control studies, ECU subsheath's visibility in
medial, central and lateral parts were noted in 66.7-80%, 63.3-80%
and 30-50% respectively.
Conclusion: ECU subsheath's athletic injuries are visible on 1.5-T MRI
studies. FS Gd T1 sequences in supination and pronation are the most
valuable
Athletic injuries of the extensor carpi ulnaris subsheath: MRI findings and utility of gadolinium-enhanced fat-saturated T1-weighted sequences with wrist pronation and supination.
OBJECTIVE: To report the magnetic resonance imaging (MRI) findings in athletic injuries of the extensor carpi ulnaris (ECU) subsheath, assessing the utility of gadolinium-enhanced (Gd) fat-saturated (FS) T1-weighted sequences with wrist pronation and supination.
METHODS: Sixteen patients (13 male, three female; mean age 30.3 years) with athletic injuries of the ECU subsheath sustained between January 2003 and June 2009 were included in this retrospective study. Initial and follow-up 1.5-T wrist MRIs were performed with transverse T1-weighted and STIR sequences in pronation, and Gd FS T1-weighted sequences with wrist pronation and supination. Two radiologists assessed the type of injury (A to C), ECU tendon stability, associated lesions and rated pulse sequences using a three-point scale: 1=poor, 2=good and 3=excellent.
RESULTS: Gd-enhanced FS T1-weighted transverse sequences in supination (2.63) and pronation (2.56) were most valuable, compared with STIR (2.19) and T1-weighted (1.94). Nine type A, one type B and six type C injuries were found. There were trends towards diminution in size, signal intensity and enhancement of associated pouches on follow-up MRI and tendon stabilisation within the ulnar groove.
CONCLUSION: Gd-enhanced FS T1-weighted sequences with wrist pronation and supination are most valuable in assessing and follow-up athletic injuries of the ECU subsheath on 1.5-T MRI