Facial asymmetry due to left masseter enlargement

Facial asymmetry confirmed by MRI to be due to left masseter enlargement (arrows).

MRI: magnetic resonance imaging.

Reproduced with permission from: Hoffman HT (ed). Iowa Head and Neck Protocols. "Masseter hypertrophy facial swelling botulinum toxin treatment." Available at: https://medicine.uiowa.edu/iowaprotocols/masseter-hypertrophy-facial-swelling-botulinum-toxin-treatment (Accessed on August 26, 2019). Copyright © 2019 The University of Iowa. All Rights Reserved.

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