Atypical cavernous hemangioma of the liver.

: Among 123 cases of hepatic cavernous hemangioma examined by CT, MRI, and/or angiography, four were considered atypical from the viewpoint of differential diagnosis on individual modalities: two cases of nonenhanced tumor, one of diffuse, homogeneous staining and rapid disappearance associated with arterioportal shunt on dynamic CT and/or angiography, and one with a large, internal, high-intensity area on MRI. Although hepatic cavernous hemangiomas are usually accurately diagnosed by the various imaging modalities, some show atypical features.