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MODERN RHEUMATOLOGY Vol.13 No.4
>MR13-4
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| Occult myopathy of the vastus intermedius muscles detected by magnetic resonance imaging in subclinical dermatomyositis: report of two cases |
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| Masahiko Nishikai1 , Kumiko Akiya1, Hironori Niizeki2, Yuuichiro Yamasaki2 and Shigeru Kuramochi3 |
(1) Department of Internal Medicine, National Tokyo Medical Center, 2-5-1 Higashigaoka, Meguro-ku, Tokyo, 152-8902, Japan
(2) Department of Dermatology, National Tokyo Medical Center, Tokyo, Japan
(3) Department of Medical Laboratories, National Tokyo Medical Center, Tokyo, Japan |
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| Received: 07 November 2002 Accepted: 13 May 2003 |
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| Abstract |
| The thigh muscles of two patients with dermatomyositis (DM) without muscle weakness or conspicuous creatine kinase elevations were studied by magnetic resonance imaging (MRI). Myositis limited to the vastus intermedius muscles (VIM) was detected in both patients, and in one, the diagnosis was confirmed by the findings of a biopsy specimen. Focal myositis of the VIM in early-stage DM, which otherwise would remain hidden by the relatively small muscle size and deep location, can be detected by MRI. |
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| Key words |
| Amyopathic dermatomyositis (ADM) - Dermatomyositis (DM) - Magnetic resonance imaging (MRI) - Vastus intermedius muscle (VIM) |
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