Hepatic angiomyolipoma with early drainage veins into the hepatic and portal vein

  • Ryota KiuchiEmail author
  • Takanori Sakaguchi
  • Ryo Kitajima
  • Satoru Furuhashi
  • Makoto Takeda
  • Takanori Hiraide
  • Yoshifumi Morita
  • Takasuke Ushio
  • Rei Ishikawa
  • Satoshi Baba
  • Hiroya Takeuchi
Case Report


Hepatic angiomyolipoma (AML) is a rare stromal tumor composed of variable admixtures of thick-walled vessels, smooth muscles and adipose tissue. One of the specific radiological findings of hepatic AML is an early drainage vein noted via enhanced computed tomography (CT). We report a case of hepatic AML showing early drainage veins into both the hepatic and portal vein. The case involved a 46-year-old woman who was referred to our hospital because of a giant hepatic tumor. CT revealed well-enhanced 14 cm and 1 cm tumors in the left and right lobes, respectively. Magnetic resonance imaging demonstrated the existence of adipose tissues in the larger tumor. Hepatic arteriography revealed early drainage veins draining into both the hepatic and portal vein. Based on a diagnosis of hepatic AML, left hepatectomy and partial hepatectomy were performed. Pathology revealed both tumors as hepatic AML based on human melanoma black-45 immuno-positivity. Hepatic AML with early drainage veins into both the hepatic and portal vein is rare. The dilated and retrogressive vein drains the abundant arterial blood flow of the tumor. The finding of early drainage veins into not only the hepatic vein but also the portal vein should be helpful for diagnosing hepatic AMLs.


Hepatic angiomyolipoma Early drainage vein Hepatic vein Portal vein 


Compliance with ethical standards

Conflict of interest

Ryota Kiuchi, Takanori Sakaguchi, Ryo Kitajima, Satoru Furuhashi, Makoto Takeda, Takanori Hiraide, Yoshifumi Morita, Takasuke Ushio, Rei Ishikawa, Satoshi Baba and Hiroya Takeuchi declare that we they have no conflict of interest.

Human/animal rights

All procedures followed have been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments.

Informed consent

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


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Copyright information

© Japanese Society of Gastroenterology 2019

Authors and Affiliations

  • Ryota Kiuchi
    • 1
    Email author
  • Takanori Sakaguchi
    • 1
  • Ryo Kitajima
    • 1
  • Satoru Furuhashi
    • 1
  • Makoto Takeda
    • 1
  • Takanori Hiraide
    • 1
  • Yoshifumi Morita
    • 1
  • Takasuke Ushio
    • 2
  • Rei Ishikawa
    • 3
  • Satoshi Baba
    • 3
  • Hiroya Takeuchi
    • 1
  1. 1.Second Department of SurgeryHamamatsu University School of MedicineHamamatsuJapan
  2. 2.Department of RadiologyHamamatsu University School of MedicineHamamatsuJapan
  3. 3.Department of Diagnostic PathologyHamamatsu University HospitalHamamatsuJapan

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