• Large cystic mass seen centred in the right perivertebral compartment (6.8 x 2.7 x 6.2cm).
• Large septated cystic component with many smaller complex cystic elements, extending to the region of the right carotid sheath and posterior parotid region.
• There are further smaller cystic components in the subcutaneous fat within the lateral neck.
• Thin peripheral enhancement, including in the septation within the large cystic component.