J Korean Soc Radiol.  2015 Sep;73(3):186-189. 10.3348/jksr.2015.73.3.186.

A Case Report of Localized Hepatic Sinusoidal Dilatation: The Diagnostic Usefulness of the Hepatobiliary Phase of Gd-EOB-DTPA-Enhanced Magnetic Resonance Imaging

• Park K
• Kim SH

• KMID: 2043610
• DOI: http://doi.org/10.3348/jksr.2015.73.3.186

Abstract

Hepatic sinusoidal dilatation (HSD) is a rare vascular disorder characterized by focal dilatation of the sinusoidal spaces in the liver. In most cases, it may be associated with venous outflow impairment. In addition, this histological change could occur in a number of systemic and hepatic conditions in the absence of hepatic venous obstruction. However, the pathogenesis has not yet been elucidated. To the best of our knowledge, imaging findings in a case of localized HSD without any additional medical disorder or oral contraceptive therapy have not been described previously in the literature written in English. Here, we describe imaging findings in a case of localized HSD mimicking a hepatic tumor, focusing on the useful findings on the gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid-enhanced hepatobiliary phase MR image.

MeSH Terms

Dilatation*
Gadolinium
Liver
Magnetic Resonance Imaging*
Gadolinium

Figure

• 

  Fig. 1 A 37-year-old woman with localized hepatic sinusoidal dilatation (HSD). A. Transabdominal ultrasonography showing an ill-defined and hypoechoic lesion (approximately 3 cm) in hepatic segment VI. B. The axial enhanced CT image during the portal venous phase (PVP) (60 sec) showing an ill-defined and hypodense structure with an almost isodense portion in hepatic segment VI. C. The axial enhanced CT image during the equilibrium phase (3 min) showing the lesion as isodense compared with adjacent liver parenchyma. D. Contrast-enhanced dynamic MR HSD images during arterial, portal venous, and transitional phases, including an unenhanced T1-weighted image. a. On the unenhanced T1-weighted image, a focal, ill-defined, slightly hypointense hepatic lesion is noted. b. In the arterial phase, the lesion is indistinct. c. In the PVP, an ill-defined and hypointense structure with an almost isointense area, as compared with adjacent liver parenchyma, is observed. d. In the transitional phase, the lesion becomes less prominent than in the PVP. E, F. On the axial (E) and reformatted coronal (F) MR images of the delayed hepatobiliary phase, the ill-defined, vessel-like hypointense structure (asterisk) is connected to the peripheral branch of the right portal vein and the middle hepatic vein, respectively (black arrow). G. Photomicrograph showing the only sinusoidal dilatation (asterisk) without peliosis in the liver tissue obtained by needle biopsy (hematoxylin and eosin, × 200).

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