간 혈관종의 Tc-99m 표지 적혈구 혈액풀 스캔 (Evaluation of Hepatic Hemangioma by Tc-99m Red Blood Cell Hepatic Blood Pool Scan) |
Author |
손명희, |
Myung-Hee Sohn, M.D. |
Affiliation |
전북대학교 의과대학 핵의학교실, 의과학연구소, 임상의학연구소 Department of Nuclear Medicine, Institute for Medical Sciences, and Research Institute of Clinical Medicine, Chonbuk National University Medical School, Chonju, Korea |
Abstract |
Hemangioma is the most common benign tumor of the liver, with a prevalence estimated as high as 7%. Tc-99m
red blood cell (RBC) hepatic blood pool scan with single photon emission computed tomography (SPECT) imaging
is extremely useful for the confirmation or exclusion of hepatic hemangiomas. The classic finding of absent or
decreased perfusion and increased blood pooling ("perfusion/blood pool mismatch") is the key diagnostic element
in the diagnosis of hemangiomas. The combination of early arterial flow and delayed blood pooling
("perfusion/blood pool match") is shown uncommonly. In giant hemangioma, filling with radioactivity appears first
in the periphery, with progressive central fill-in on sequential RBC blood pool scan. However, the reverse filling
pattern, which begins first in the center with progressive peripheral filling, is also rarely seen. Studies with
false-positive blood pooling have been reported infrequently in nonhemangiomas, including hemangiosarcoma,
hepatocellular carcinoma, hepatic adenoma, and metastatic carcinomas (adenocarcinoma of the colon, small cell
carcinoma of the lung, neruroendocrine carcinoma). False-negative results have been also reported rarely except
for small hemagniomas that are below the limits of spatial resolution of gamma camera.(Korean J Nucl Med
39(3):151-162, 2005) |
Keyword |
Hepatic hemangioma, Tc-99m RBC, blood pool scan, SPECT, false-positive, false-negative |
Full text Article |
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