Wedge-shaped Parenc hymal Enhancement Peripheral to the Hepatic Hemangioma: Two-phase Spiral CT Findings.
10.3348/jkrs.2000.42.2.273
- Author:
Kyoung Won KIM
1
;
Tae Kyoung KIM
;
Joon Koo HAN
;
Ah Young KIM
;
Hyun Ju LEE
;
Chi Sung SONG
;
Byung Ihn CHOI
Author Information
1. Department of Radiology, Seoul National University College of Medicine, Seoul, Korea. hanjk@radcom.snu.ac.kr
- Publication Type:Original Article
- Keywords:
Angioma, gastrointestinal tract;
Liver neoplasms, CT;
Liver neoplasms, diagnosis;
Shunts, arteriovenous;
Computed tomography (CT), helical
- MeSH:
Hemangioma*;
Humans;
Incidence;
Tomography, Spiral Computed*
- From:Journal of the Korean Radiological Society
2000;42(2):273-279
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To determine the incidence of hepatic hemangiomas associated with wedge-shaped parenchymal enhancements adjacent to the tumors as seen on two-phase spiral CT images obtained during the hepatic arterial phase and to characterize the two-phase spiral CT findings of those hemangiomas. MATERIALS AND METHODS: One hundred and eight consecutive hepatic hemangiomas in 63 patients who underwent two-phase spiral CT scanning during an 11-month period were included in this study. Two-phase spiral CT scans were obtained during the hepatic arterial phase(30-second delay) and portal venous phase(65-second delay) after injection of 120mL of contrast material at a rate of 3mL/sec. We evaluated the frequency with which wedge-shaped parenchymal enhancement was adjacent to the hemangiomas during the hepatic arterial phase and divided hemangiomas into two groups according to whether or not wedge-shaped parenchymal enhancement was noted (Group A and Group B). The presence of such enhancement in hemangiomas was cor-related with tumor size and the grade of intratumoral enhancement. RESULTS: In 24 of 108 hemangiomas, wedge-shaped parenchymal enhancement adjacent to hepatic tumors was seen on two-phase CT images obtained during the hepatic arterial phase. Mean hemangioma size was 22mm in Group A and 24mm in Group B. There was no statistically significant relationship between lesion size and the presence of wedge-shaped parenchymal enhancement adjacent to a hemangioma. In 91.7% and 1 00% of tumors in Group A, and in 9.6% and 17.8% in Group B, hemangiomas showed more than 50% intra-tumoral enhancement during the arterial and portal venous phase, respectively. Wedge-shaped parenchymal enhancements peripheral to hepatic hemangiomas was more frequently found in tumors showing more than 50% intratumoral enhancement during these two phases(p<0.01). CONCLUSION: Wedge-shaped parenchymal enhancements is not uncommonly seen adjacent to hepatic heman-giomas on two-phase spiral CT images obtained during the hepatic arterial phase. A hemangioma showing-wedge-shaped parenchymal enhancement tends to show more than 50% intratumoral enhancements during the arterial and portal venous phase.
