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Abdominal Imaging

, Volume 40, Issue 3, pp 500–509 | Cite as

CT and MR imaging findings of hepatic epithelioid hemangioendotheliomas: emphasis on single nodular type

  • Eu Hyun Kim
  • Sung Eun RhaEmail author
  • Young Joon Lee
  • Ie Ryung Yoo
  • Eun Sun Jung
  • Jae Young Byun
Article

Abstract

Purpose

To evaluate imaging findings of hepatic epithelioid hemangioendothelioma (HEH), with emphasis on solitary form at the initial presentation.

Materials and methods

Ten cases of pathologically confirmed HEH were retrospectively reviewed; seven patients had CT and MR images and three had only CT images. Two radiologists assessed the followings in consensus: lesion number, size, location, presence of capsular retraction and calcification, attenuation, signal intensity, and enhancement pattern.

Results

Initially, HEHs manifested as a single mass (n = 5) or multiple masses (n = 5). One case demonstrated a solitary nodule at first, which subsequently transformed to multifocal nodules on serial follow-up. The maximal diameter of the lesions ranged from 1.8 to 10 cm (mean 4.2 cm). All cases showed predominant subcapsular location. Capsular retraction was seen in multinodular types, but not in solitary types. Two patients had intra-lesional calcifications. HEHs showed minimal enhancement (7/7 patients) on the hepatic arterial phase CT and rim-like enhancement (5/10 patients), minimal enhancement (2/10 patients), multilayered target enhancement (2/10 patients), and peripheral nodular enhancement (1/10 patients) on the portal venous phase CT. On MR images (n = 7), HEHs showed hypointensity on T1-weighted images and hyperintensity on T2-weighted images. Dynamic contrast-enhanced MR images revealed progressive centripetal fill-in enhancement (7/7 patients). On Gd-EOB-DTPA-enhanced hepatobiliary phase images, HEH manifested as homogeneous hypointensity (3/5 patients) and target-shaped hypointensity (2/5 patients).

Conclusion

HEH can manifest as single nodular, multinodular, or diffuse type. Common imaging features of HEH are multiple subcapsular nodules with coalescence, capsular retraction, peripheral, and delayed enhancement. However, HEH can manifest as a solitary subcapsular mass with minimal or rim-like enhancement at early phase and progressive centripetal fill-in enhancement during dynamic phase imaging, representing early stage of HEH. A single nodular type can progress to multifocal nodular type during follow-up.

Keywords

CT Hepatic epithelioid hemangioendothelioma Liver MRI PET/CT 

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Eu Hyun Kim
    • 1
  • Sung Eun Rha
    • 1
    Email author
  • Young Joon Lee
    • 1
  • Ie Ryung Yoo
    • 1
  • Eun Sun Jung
    • 2
  • Jae Young Byun
    • 1
  1. 1.Department of Radiology, Seoul St. Mary’s Hospital, College of MedicineThe Catholic University of KoreaSeoulRepublic of Korea
  2. 2.Department of Hospital Pathology, Seoul St. Mary’s Hospital, College of MedicineThe Catholic University of KoreaSeoulRepublic of Korea

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