A case of well-differentiated cholangiolocellular carcinoma visualized with contrast-enhanced ultrasonography using Sonazoid

  • JOSHITA Satoru
    Department of Internal Medicine, Division of Gastroenterology and Hepatology, Shinshu University School of Medicine
  • ICHIJO Tetsuya
    Department of Internal Medicine, Division of Gastroenterology and Hepatology, Shinshu University School of Medicine
  • SUZUKI Fumitaka
    Department of Surgery, Shinshu University School of Medicine
  • YOKOYAMA Takahide
    Department of Surgery, Shinshu University School of Medicine
  • SUGIYAMA Yukiko
    Department of Radiology, Shinshu University School of Medicine
  • FUKUSHIMA Mana
    Department of Laboratory Medicine, Shinshu University School of Medicine
  • KAMIJO Atsushi
    Department of Internal Medicine, Division of Gastroenterology and Hepatology, Shinshu University School of Medicine
  • KOMATSU Michiharu
    Department of Internal Medicine, Division of Gastroenterology and Hepatology, Shinshu University School of Medicine
  • UMEMURA Takeji
    Department of Internal Medicine, Division of Gastroenterology and Hepatology, Shinshu University School of Medicine
  • YOSHIZAWA Kaname
    Department of Internal Medicine, Division of Gastroenterology and Hepatology, Shinshu University School of Medicine
  • MIYAGAWA Shinichi
    Department of Surgery, Shinshu University School of Medicine
  • TANAKA Eiji
    Department of Internal Medicine, Division of Gastroenterology and Hepatology, Shinshu University School of Medicine

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We here report the first case of cholangiolocellular carcinoma (CoCC) visualized with contrast-enhanced ultrasonography (CEUS) using a second-generation contrast agent, Sonazoid. A 76-year-old man was admitted to our hospital for evaluation of a hepatic tumor. The tumor was described as having hyper-enhancement in the early phase and persistent enhancement in the late phase by contrast-enhanced computed tomography (CT) and magnetic resonance imaging (MRI), as well as hypervascularity by angiography. CEUS assessment of the nodule showed diffuse and homogeneous enhancement in the pure arterial phase, which became progressively hypoechoic relative to the adjacent liver parenchyma during the portal vein and late phases (mixed vascular phase), and showed a contrast defect with an unclear border in the Kupffer phase. Histologically we diagnosed this hepatic tumor as CoCC. In light of the above findings and the rarity of CoCC, it is helpful to incorporate the results of several imagings, such as CT, MRI, angiography and CEUS with a second-generation contrast agent when clinically diagnosing CoCC.

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