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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.