"Inflammatory pseudotumor" of liver with occlusive phlebitis: report of a case in a child and review of the literature.

An unusual "tumor" involving the right lobe of the liver of a young child is reported. Morphologically, the lesion had the features of "inflammatory pseudotumor." We were able to find only one previous report of a similar case in the literature. Unusual changes, which may be designated "occlusive phlebitis," were present in the medium-sized and large veins. Histologically, the lesion, including the vascular changes, had similaritites to the entities included in the group of "multifocal fibrosclerosis." It is believed that these unusual vascular changes, which have also been observed in a case of "inflammatory pseudotumor" of the parotid gland, probably contributed to the disease process.