Figure 7.

(a) MRI of neck. T₁ weighted axial image shows a well-defined macrocystic lesion anterior to the proximal left internal and external carotid arteries, with internal fluid–fluid levels, multiple septa and intrinsic T₁ hyperintensity. Additionally, there are well-defined T₂ hyperintense multifocal lesions in the left base of the tongue and pre-mandibular soft tissue in the midline, seen on the T₂ weighted axial short tau inversion–recovery image suggestive of venous malformation (b). These show peripheral enhancement of the cystic lesion and intrinsic enhancement of the adjacent abnormal T₂ hyperintense soft-tissue lesion on T₁ fat-saturated post-contrast image (c), suggestive of venolymphatic malformation.