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MR Vol.11 No.2 indexに戻る
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MODERN RHEUMATOLOGY
Vol.11 No.2 |
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Diagnostic imaging of unstable superior glenoid
labral detachment: a comparison between MR arthrography and unenhanced
MRI |
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| M. Yoneda1, K. Izawa2, S. Wakitani3, S.
Nakasato4, K. Hayashida5, S. Nakagawa5 |
(1)Department of Sports Medicine, Osaka Kosei-nenkin
Hospital, 4-2-78 Fukushima, Fukushima-ku, Osaka-City, Osaka 553-0003,
Japan Tel. +81-6-6441-5451; Fax 81-6-6445-8900 e-mail: minoru-yoneda@ad7.mopera.ne.jp
(2) Department of Orthopaedic Surgery, Toneyama National Hospital, Osaka, Japan
(3)Department of Orthopaedic Surgery, National Osaka-Minami Hospital, Osaka,
Japan
(4)Department of Orthopaedic Surgery, Han-nan Chuo Hospital, Osaka, Japan
(5)Department of Orthopaedic Surgery, Hoshigaoka Kosei-nenkin Hospital, Osaka,
Japan |
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| Abstract |
| Abstract We compared efficacy of magnetic resonance
arthrography (MRA) and magnetic resonance imaging (MRI) for the detection
of superior glenoid labral detachment, and especially unstable superior
labrum anterior-posterior (SLAP) type 2 lesions. MR imagings and
MR arthrograms of 90 shoulders of 90 patients, including 30 shoulders
of unstable SLAP 2 lesions, were interpreted by a novice and an expert
observer. These results were correlated with arthroscopic findings.
For the expert observer, MRI had a sensitivity of 53%, a specificity
of 93%, and an accuracy of 80%, which were improved to 60%, 98%,
and 85%, respectively, by MRA. These increases were statistically
insignificant. For the novice observer, MRI had a sensitivity of
45%, a specificity of 80%, and an accuracy of 64%, which were significantly
improved to 76%, 83%, and 80%, respectively, by MRA. In detecting
unstable SLAP 2 lesions, MRA proved to be useful to a novice interpreter,
but not significantly useful to an experienced interpreter, compared
with unenhanced MRI. We advocate MRA as the examination of first
choice for detecting unstable SLAP 2 lesions if they are strongly
suspected clinically. |
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| Key words |
| Key words Interobserver difference ・ MR arthrography
・ MRI ・ Shoulder ・ SLAP lesion |
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