Fig. 31From: MRI of acute neck infections: evidence summary and pictorial reviewInfected second branchial cleft cyst (pathology proven). MRI shows a large cystic mass (arrows)Â under a swollen sternocleidomastoid muscle on axial T2-weighted (a) and post-contrast T1-weighted (b) images. ADC map shows a layering of purulent fluid (c), consistent with a secondary infection of a cystic massBack to article page