Fig. 1.

a–e A patient with right lobe atrophy associated with cholangiocarcinoma. a–c Contrast-enhanced CT; d, e T2-weighted magnetic resonance imaging (MRI)/magnetic resonance cholangiopancreatogram (MRCP). a The right lobe is atrophied, and lies posteriorly with markedly dilated ducts. b The caudate lobe is probably hypertrophied (black arrow), and there is definite hypertrophy of segment IV (white arrow) and the left lateral segments (curved arrow). c The hypertrophied left lobe (segment III) extends inferiorly (white arrow). d, e Within the atrophied lobe, the ducts are markedly dilated and crowded (white arrow). e The ducts of the hypertrophied lobe are mildly dilated and spread out (arrowhead)