Intramuscular hemangioma - masseter muscle

Case contributed by Ammar Haouimi
Diagnosis almost certain


Painless swelling of the right parotid region. Ultrasound exam was inconclusive.

Patient Data

Age: 15 years
Gender: Female

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. 

Case Discussion

MRI features characteristic of an intramuscular hemangioma within the masseter muscle.

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

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