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  • Title: Inflammatory pseudotumor of the liver associated with malignant disease: report of two cases and a review of the literature.
    Author: Nishimura R, Teramoto N, Tanada M, Kurita A, Mogami H.
    Journal: Virchows Arch; 2005 Sep; 447(3):660-4. PubMed ID: 15968548.
    Abstract:
    Two cases of inflammatory pseudotumor (IPT) of the liver associated with gastrointestinal tract cancer are reported. In addition, the etiological correlation between IPT and abscesses of the liver in cancer patients is discussed. The first patient was a 63-year-old woman who underwent distal gastrectomy and partial hepatectomy under a diagnosis of stomach cancer with liver metastasis. The second patient was a 66-year-old man who had undergone surgery for rectal cancer 6 years previously and underwent partial hepatectomy under a diagnosis of metastasis of rectal cancer to the liver. The gastric cancer was a papillary adenocarcinoma limited to the mucosa, and the rectal cancer was a moderately differentiated adenocarcinoma limited to the subserosa. The resected liver tumor in the first case measured 5.5 x 5.0 x 4.0 cm and was 2.5 x 1.9 x 1.6 cm in the second. The cut surface showed that both masses were well circumscribed and divided into lobules by fibrous tissue. They were yellowish white in color and there was no evidence of necrosis or hemorrhage. Histologically the masses consisted of fibrous areas and cellular areas, and the cellular areas consisted of fascicles of plump spindle cells mingled with varying numbers of plasma cells, lymphocytes, and histiocytes. The masses were diagnosed as IPTs. Obliterating phlebitis suggesting infection via the portal vein was seen in the adjacent liver tissue in both cases. According to previous cases reported in the literature, there are three types of cancers associated with hepatic IPT: gastrointestinal tract cancer, biliary tract cancer, and cancers that need strong systemic chemotherapy. The underlying cancer types of IPT of the liver are almost similar to those associated with pyogenic liver abscesses suggesting the etiological correlation between IPT and abscesses of the liver.
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