MSK and sports case 4

Findings:

• Coronal and Axial T2 images show symmetric significant hypertrophy of bilateral masticator muscles.
• No lesion or edema within the muscles.

Diagnosis:

Bilateral masticator muscle hypertrophy (Minotaur syndrome)

Discussion:

• Masticator muscle hypertrophy is a rare condition which predominantly affects temporalis and masseter muscles, and can be unilateral or bilateral. 
• It can be seen in anxious individuals who do teeth grinding (bruxism) or those with a history of long standing gum chewing. 
• Role of imaging is to exclude myositis or tumors.
• It is named after the Minotaur in Greek mythology who is portrayed as having  the head of a bull and body of a man.