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Epithelioid angiomyolipoma of the liver: CT and MRI features

Jian-song Ji1, Chen-ying Lu, Zu-fei Wang

  • 1Department of Radiology, Lishui Central Hospital, Southeast University, 289 Kuocang Road, Lishui, 323000, Zhejiang, China. jjstcty@sina.com

Abdominal Imaging
|May 22, 2012
PubMed

Insights

Computed tomography (CT) and magnetic resonance imaging (MRI) can identify epithelioid angiomyolipoma of the liver (Epi-HAML). Key features include the absence of fat, a non-capsulated appearance, and characteristic hypervascularity, aiding in distinguishing it from other liver tumors.

Area of Science:

  • Radiology
  • Hepatology
  • Oncology

Background:

  • Epithelioid angiomyolipoma of the liver (Epi-HAML) is a rare hepatic tumor.
  • Accurate preoperative diagnosis of Epi-HAML is challenging due to overlapping imaging features with other liver lesions.

Purpose of the Study:

  • To retrospectively evaluate the computed tomography (CT) and magnetic resonance imaging (MRI) features of Epi-HAML.
  • To identify imaging characteristics that can help differentiate Epi-HAML from other hepatic tumors using pathological findings as a reference.

Main Methods:

  • Retrospective review of CT and MRI findings for six confirmed cases of Epi-HAML.
  • Analysis of lesion characteristics including presence of adipose tissue, capsular definition, and vascular enhancement patterns.

Main Results:

  • Absence of macroscopic adipose tissue within the Epi-HAML lesions was consistently observed.
  • Lesions lacked a distinct capsule.
  • Characteristic hypervascularity with central punctiform or filiform vessels was noted during contrast enhancement.

Conclusions:

  • The combination of no visible adipose tissue, absence of a capsule, and specific hypervascular enhancement patterns on CT/MRI are key imaging features of Epi-HAML.
  • Recognition of these features may aid in distinguishing Epi-HAML from other hepatic neoplasms, potentially guiding further diagnostic and management strategies.

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