Fig. 1
From: Cystic pancreatic lesions: MR imaging findings and management
Cystic complications of acute pancreatitis. a–d Pseudocyst. Patient with a previous interstitial edematous pancreatitis. At follow-up after 1 year, a cystic lesion with no septa or debris is appreciable in the tail of the pancreas, hyperintense on T2w (a), without high signal intensity on high b value DWI (b) and no enhancement after contrast media administration (c). At further follow-up after 6 months, the lesion is decreased in size (d). e–n: WON. A large necrotic collection is appreciable in a patient with necrotizing acute pancreatitis (e). After 1 year, a large collection with debris is still appreciable in the tail of the pancreas, clearly visible on T2w as cystic lesion with low signal intensity foci (f). Debris show inhomogeneous signal intensity on DWI (g), ADC map (h) and T1 unenhanced (i), but do not show any enhancement after contrast media administration (l, m). On T2 HASTE coronal view, the caudal extension of the collection is appreciable (n)