(A,F) MRI of upper abdomen with MRCP in a 4-month infant, T1 W, T2 W and SPAIR sequence in axial planes, revealed a gigantic cystic lesion in the sub-hepatic region (orange arrows), which measured 8.2 × 7.2 × 8.1 cm in size. The cyst was hypo-intense on T1 W, hyper-intense on T2 W and SPAIR sequences (orange arrow, A,C). The cyst also showed a fluid-fluid level (blue arrow, B). The cyst was gigantic and was seen to be indenting the inferior surface of the liver and also causing superior displacement of the organ (D). Antero-laterally the cyst was seen to be extending up till the abdominal wall and posteriorly the cyst was abutting the right kidney and displacing it further posteriorly (red arrows, A,C). Medially the cyst was displacing the pancreatic head to the left side. A minimal amount of fluid was seen in the hepatic sub-capsular region (yellow arrows, A,B). T2 W coronal, BTFE axial and BTFE coronal images showed that the liver was normal (green arrows, D,F). The gall bladder was normal (white arrow, E) (Color version of figure is available online)