MRI
Axial STIR
MR-Angio 3D MIP MRA
Axial T1 C+ fat sat
MRI shows a hypervascularized lesion of the left sternocleidomastoid muscle.
Differential diagnoses should include hypervascular tumour, AVM (arteriovenous malformation), haemangioma, etc.
A diagnostic angiography revealed absent augmented venous drainage rendering an AVM improbable and showed typical signs of a haemangioma.