Hepatic Hemangioma with Atypical Sonographic Features: Value of Two-Phase Spiral CT.
10.3348/jkrs.1997.37.2.279
- Author:
Young Worl KIM
1
;
June Sik CHO
;
Young Hwan LEE
;
Yong Soo KANG
;
Hyoung Sub KIM
;
Yon Su CHUNG
Author Information
1. Department of Diagnostic Radiology, Chungnam National University School of Medicine.
- Publication Type:Original Article
- Keywords:
Liver neoplasms, CT;
Liver neoplasms, US;
Computed tomography(CT), helical
- MeSH:
Hemangioma*;
Humans;
Retrospective Studies;
Tomography, Spiral Computed*;
Ultrasonography*
- From:Journal of the Korean Radiological Society
1997;37(2):279-284
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: The purpose of this study was to evaluate enhancement patterns, as seen on two-phase spiral CT, of hepatic hemangiomas in which atypical features had been seen on sonography (US) MATERIALS AND METHODS: Two-phase spiral CT scanning was performed in 18 patients in whom 24 atypical hemangiomas had been seen on US. Two-phase images were obtained at 25-45 seconds (arterial dominant phase) and 2-5 minutes (equilibrium phase) after the initiation of a bolus injection of contrast material (150 ml, 5 ml/sec). Enhancement patterns of hemangiomas during each phase were classified as homogeneous high, peripheral high, or low attenuation, and were retrospectively analyzed. RESULTS: In the arterial dominant phase of spiral CT, low attenuation was seen in nine hemangiomas (38%), globular or spotty peripheral high attenuation in 14 (58%), and homogeneous high attenuation in one (4%). In the equilibrium phase, enhancement patterns were peripheral high attenuation (partial fill-in) in 18 lesions (75%), and homogeneous high attenuation (complete fill-in) in three (12.5%), In the other three (12.5%) enhancement showed no significant change; in one of these, density was slightly less than in the arterial phase, and two showed subtle peripheral high attenuation. Fourteen hemangiomas (58%) showed globular or spotty peripheral high attenuation in the arterial dominant phase and peripheral or homogeneous high attenuation with progressive centripetal enhancement in the equilibrium phase. CONCLUSION: Our results suggest that two-phase spiral CT during the arterial dominant and equilibrium phase is useful in differentiating hepatic hemangiomas with atypical features seen on US from malignant hepatic tumors.
