Mylohyoid boutonniere

Case contributed by Dr Charlie Chia-Tsong Hsu

Patient Data

Age: 65
Gender: Male
Modality: MRI

Axial T2 FS of oral cavity demonstrating bilateral defects (red arrows) in the mylohyoid muscles (*). The right sublingual gland protrudes through the defect into the submandibular space giving the impression of a boutonniere deformity. The defect is smaller on the left side with only protrusion of of fat and vessels.

Coronal images again showing bilateral defects in the mylohyoid muscles in the mid coronal images (B and D). Note the intact muscle sling on the sequential anterior (A and C) and posterior (C and E) images.

Case Discussion

Mylohyoid boutonniere is a normal focal discontinuity in the mylohyoid muscle, which may permit the sublingual salivary gland, fat or vessels, or a combination of each, to protrude out from the sublingual space into the submandibular space.

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Case Information

rID: 33109
Case created: 31st Dec 2014
Last edited: 27th Jun 2016
System: Head & Neck
Inclusion in quiz mode: Included

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