Intramuscular hemangioma - masseter muscle
Painless swelling of the right parotid region. Ultrasound exam was inconclusive.
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A small lobulated soft tissue mass is noted within the right masseter muscle, isointense to the muscle on T1WI, markedly hyperintense on T2WI with progressive enhancement and complete fill-in on delayed postcontrast sequences. No restricted diffusion is seen on DWI/ADC.
Hemangioma within the masseter muscle may be confused with a parotid tumor or other muscular lesions. MRI exam is the modality of choice to precise its origin, characteristics features as well as its extent.
Additional contributor: Houssam-eddine Kouachi, Radiographer CIM Aurés, Batna, Algeria