On magnetic resonance imaging (MRI) studies, wedge-shaped areas of sig
nal abnormality noted in association with liver lesions have been attr
ibuted to secondary phenomena and are said to be substantially larger
than the actual tumor. We describe the MRI and pathological appearance
of a wedge-shaped cholangiocarcinoma. In cases where therapy might be
affected, biopsy of wedge-shaped MRI abnormalities associated with he
patic malignancy should be considered for accurate tumor staging.