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DOI: 10.1148/radiol.2442041504
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Case 118: Proliferative Myositis1

Mustafa Kemal Demir, MD2, Mahmut Beser, MD and Okan Akinci, MD

1 From the Department of Radiology, Haydarpasa Numune Education and Research Hospital (M.K.D., O.A.), Istanbul, Turkey; and Department of Radiology, Taksim Education and Research Hospital, Istanbul, Turkey (M.B.). Received August 31, 2004; revision requested November 8; revision received December 2; accepted December 17; final version accepted January 27, 2005.


Figure 1A
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  		Figure 1a: Oblique (a) sagittal and (b) coronal fat-saturated T2-weighted spin-echo MR images of the right arm (repetition time msec/echo time msec, 2410/70) show a hyperintense soft-tissue mass (arrows) in the belly of the right biceps muscle preserving the muscle fibers (arrowheads) without disruption.

 

Figure 1B
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  		Figure 1b: Oblique (a) sagittal and (b) coronal fat-saturated T2-weighted spin-echo MR images of the right arm (repetition time msec/echo time msec, 2410/70) show a hyperintense soft-tissue mass (arrows) in the belly of the right biceps muscle preserving the muscle fibers (arrowheads) without disruption.

 

Figure 2
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  		Figure 2: Transverse T2-weighted gradient-echo MR image of the right arm (488/14; flip angle, 35°) shows a moderately high–signal-intensity intramuscular soft-tissue mass (arrows). There are no important blood- or calcification-related signals.

 

Figure 3
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  		Figure 3: Sagittal T1-weighted spin-echo MR image of the right arm (600/15) shows an isointense homogeneous intramuscular mass (arrows).

 

Figure 4
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  		Figure 4: Contrast material–enhanced sagittal T1-weighted spin-echo MR image of the right arm (600/15) shows a soft-tissue mass (arrows) with almost homogeneous enhancement preserving the muscle fibers without disruption.

 




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