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KMID : 0361820130320030193
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Journal of the Korean Society of Medical Ultrasound
2013 Volume.32 No. 3 p.193 ~ p.197
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Sonographic Appearance of Idiopathic Hypertrophy of the First Dorsal Interosseous Muscle of the Hand
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Yang Woo-Jin
Lee Ka-Eun
Jin Wook
Park So-Young
Hwang Su-Yeon
Park Ji-Seon
Ryu Kyung-Nam
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Abstract
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We present a rare case of a 28-year-old man with a non-tender soft tissue enlargement on the dorsal side of the first web space of the right hand. Sonographic evaluation showed thickening of the dorsal thenar muscle (dorsal interosseous muscle) without a mass-like or cystic lesion, as compared with the left dorsal thenar muscle. On grasping position, this finding was more prominent and no significantly increased vascular flow was observed in this muscle. We were able to diagnose idiopathic hypertrophy of the first dorsal interosseous muscle solely by sonography. Ultrasonographic evaluation is a noninvasive and accessible tool for diagnosis of pseudotumors, such as idiopathic thenar muscle hypertrophy.
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KEYWORD
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Ultrasonography, Thenar muscle, Pseudotumor, Hypertrophy
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