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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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American Journal of Neuroradiology 28:1876-1877, November-December 2007
© 2007 American Society of Neuroradiology

Case Report
HEAD & NECK

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

Please address correspondence to Wendy R.K. Smoker, Department of Radiology, Division of Neuroradiology, University of Iowa Hospitals and Clinics, 0453-G-JCP, 200 Hawkins Dr, Iowa City, IA 52242; e-mail wendy-smoker{at}uiowa.edu

SUMMARY: We report a case of rhabdomyolysis due to acetaminophen overdose involving the lateral pterygoid muscles bilaterally, in addition to the other muscles of the abdomen and pelvis. To the best of our knowledge, involvement of the head and neck muscles by rhabdomyolysis has not been reported previously. The isolated involvement of the lateral pterygoid muscles may be due to the presence of the surrounding pterygoid venous plexus. It is important to be aware of the imaging characteristics of rhabdomyolysis and to consider the possibility of involvement of head and neck muscles to aid in early diagnosis and avoid misinterpretation of the imaging findings.