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AJNR - American Journal of Neuroradiology

Published ahead of print on September 26, 2007
doi: 10.3174/ajnr.A0730

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Lateral Pterygoid Muscle Rhabdomyolysis

V. Jain^a, A.N. Ellingson^a and W.R.K. Smoker^a

^a From the Department of Radiology, University of Iowa Hospitals and Clinics, Iowa City, Ia

View larger version (24K): [in this window] [in a new window]   Fig 1. CT (day 1) and MR (day 16) of the brain. A, CT shows enlargement and hypoattenuation in the lateral pterygoid muscles bilaterally. B-D, MR images show that the muscles are isointense on the T1-weighted image (B), hyperintense on the T2-weighted image (C), and enhanced on the postcontrast fat-suppressed T1-weighted image (D).

View larger version (110K): [in this window] [in a new window]   Fig 2. MR study performed on day 26 shows hyperintensity on the T1-weighted image (A) and homogenous contrast enhancement on the postcontrast fat-suppressed T1-weighted image (B). T2 prolongation was also noted (data not shown).

View larger version (129K): [in this window] [in a new window]   Fig 3. CT image of the pelvis done on day 26 (A) shows hyperattenuation in multiple muscles, which eventually resolved on the CT scan done on day 44 (B).