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A case of hepatic inflammatory pseudotumor protruding from the liver surface

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Abstract

We report a case of a resected hepatic inflammatory pseudotumor (IPT) protruding from the liver surface. A 69-year-old male with diabetes mellitus was admitted to hospital for investigation of an hepatic mass. An irregularly shaped, low-echoic mass measuring 21 × 18 mm was identified by ultrasound in S6. On computed tomography, the tumor appeared to be growing extrahepatically. After contrast enhancement, the lesion showed persistent peripheral enhancement, while the central part was hypoenhanced. On T2-weighted magnetic resonance imaging (MRI), the central portion of the lesion was hyperintense compared with the periphery. EOB-enhanced MRI revealed the mass to be being hypointense in contrast to the surrounding liver parenchyma in the hepatobiliary phase. On diffusion-weighted images, the lesion was hyperintense. Percutaneous biopsy was not attempted to avoid tumor cell dissemination. The patient underwent partial hepatectomy because of suspected malignancy. Histopathological examination of the resected specimen revealed fibrotic tissue and abundant vessels in the periphery, while a massive infiltration of inflammatory cells and fewer vessels were observed in the center. The patient was finally diagnosed with hepatic IPT of the fibrohistiocytic type.

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Authors and Affiliations

  1. Department of Gastroenterology, Kyojinkai Komatsu Hospital, 11-6 Kawakatsu-cho, Neyagawa City, Osaka Prefecture, 572-8567, Japan

    Takashi Obana & Shuuji Yamasaki

  2. Department of Surgery, Kyojinkai Komatsu Hospital, Neyagawa, Japan

    Kazushi Nishio

  3. Department of Pathology, Takeda Pathology Center, Osaka, Japan

    Yasushi Kobayashi

Authors
  1. Takashi Obana
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  2. Shuuji Yamasaki
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  3. Kazushi Nishio
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  4. Yasushi Kobayashi
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Correspondence to Takashi Obana.

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Conflict of Interest:

Takashi Obana, Shuuji Yamasaki, Kazushi Nishio, and Yasushi Kobayashi declare that they have no conflict of interest.

Human/Animal Rights:

All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and its later amendments.

Informed Consent:

Informed consent was obtained from all patients for being included in the study.

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Obana, T., Yamasaki, S., Nishio, K. et al. A case of hepatic inflammatory pseudotumor protruding from the liver surface. Clin J Gastroenterol 8, 340–344 (2015). https://doi.org/10.1007/s12328-015-0605-8

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  • DOI: https://doi.org/10.1007/s12328-015-0605-8

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