Fig. 12From: MRI of acute neck infections: evidence summary and pictorial reviewDifferentiating between RPE and a retropharyngeal abscess: RPE is usually very bright on T2-weighted images, whereas abscess has an intermediate signal. Enhancement of RPE is variable, whereas an abscess does not enhance. Finally, the key is ADC: bright in RPE, dark in abscess. Arrows denote collections. Image modified from ref. [12]Back to article page