Intrahepatic Bile Duct Adenoma Mimicking Hepatic Metastasis: Case Report and Review of the Literature

Takumi, Koji; Fukukura, Yoshihiko; Nagasato, Kohei; Nakajo, Masayuki; Natsugoe, Shoji; Higashi, Michiyo

doi:10.2463/mrms.2012-0078

Cited by 8 publications

(18 citation statements)

References 10 publications

(9 reference statements)

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“…Two cases in our series, where arterial phase enhanced images had been obtained, also showed arterial phase hyperenhancement. Of the six cases in the literature where portal venous phase or delayed phase contrast images had been obtained, four demonstrated hyperenhancement (7,10,12,13), one was isodense (15), and one was hypodense (16). Similar findings were also seen in our series with four of five cases demonstrating hyperenhancement on portal venous phase or delayed phase images.…”

Section: Discussionsupporting

confidence: 76%

“…Arterial phase hyperenhancement was seen in six of seven cases reported in literature (7,10,(12)(13)(14)(15). One case showed hypoenhancement relative to hepatic parenchyma (16).…”

Section: Discussionmentioning

confidence: 88%

“…Of the six cases reported in literature with unenhanced imaging, five were hypodense (7,10,13,15,16) and one was hyperdense with calcifications (14). Although BDA can have calcifications that can account for hyperdensity on unenhanced CT, majority of cases are likely to be hypodense.…”

Section: Discussionmentioning

confidence: 98%

“…On US imaging, four cases were previously reported and described as hypoechoic to liver parenchyma (10)(11)(12) (Table 1). Of the three cases with US imaging in our series, there was a varied appearance, with one hyperechoic and two hypoechoic lesions.…”

Section: Discussionmentioning

confidence: 99%

“…Given the confusion with BDA nomenclature in the published literature, particularly with biliary hamartomas (Von Meyenberg Complexes), articles were included if the described histologic description of BDA was specified (i.e., numerous and small ducts interspersed with fibrous stroma) (8). Our search identified 10 studies with 13 cases in total (7,(10)(11)(12)(13)(14)(15)(16)(17)(18). These results are summarized in the Table, including imaging findings from the present study.…”

Section: Methodsmentioning

confidence: 99%

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Diagn Interv Radiol

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PURPOSEWe aimed to evaluate the imaging features of bile duct adenoma (BDA) on ultrasonography (US), computed tomography (CT), and magnetic resonance imaging (MRI). METHODSRetrospective search in our institution database was performed for histologically confirmed BDA. Their imaging studies before histologic confirmation were reviewed. The search identified seven adults (mean age, 52.9 years) with histologically proven single BDA each. US (n=3), CT (n=5), and MRI (n=3) were performed before histologic confirmation. Additionally, a systematic English literature review for BDA and reported imaging findings since 2000 was also conducted using the following search criteria "bile duct adenoma, peribiliary hamartoma, biliary adenoma, CT, ultrasound, MRI" (date range: 01/01/2000 through 08/31/2016). The imaging findings of those cases reported were summarized and compared with our series. RESULTSAll seven individual nodules were well circumscribed. Five lesions were located in the right hepatic lobe and two in the left hepatic lobe. On US, lesions appeared hypoechoic (n=2) and hyperechoic (n=1). BDA was hypodense on unenhanced CT images (n=1). On MRI, BDA were hypointense on T1 (n=3), hyperintense on T2 (n=3), and hyperintense on diffusion-weighted images (n=2). On contrast-enhanced CT and MRI, BDAs showed arterial phase hyperenhancement that persisted on portal venous/delayed phase images. CONCLUSIONBDA demonstrates characteristic arterial phase hyperenhancement that persisted into the portal venous and delayed phases on CT and MRI, which may be useful in differentiating from other hepatic lesions.You may cite this article as: Chuy JA, Garg I, Graham RP, VanBuren WM, Venkatesh SK. Imaging features of bile duct adenoma: case series and review of literature. Diagn Interv Radiol 2018; 24:249-254.

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Section: Discussionsupporting

confidence: 76%

“…Arterial phase hyperenhancement was seen in six of seven cases reported in literature (7,10,(12)(13)(14)(15). One case showed hypoenhancement relative to hepatic parenchyma (16).…”

Section: Discussionmentioning

confidence: 88%