Coşkun A, Oztürk M, Karahan O I, Erdogan N, Işin S, Güleç M
Erciyes University Medical Faculty, Department of Radiology, Kayseri, Turkey.
Acta Radiol. 2004 Aug;45(5):492-8. doi: 10.1080/02841850410005912.
To determine and compare the imaging features of hepatic alveolar Echinococcosis using color Doppler US, CT, and MRI.
Abdominal CT and MRI with and without contrast agents and color Doppler US were performed on seven patients with hepatic alveolar Echinococcosis. The lesions were evaluated for location, features of echogenicity, intensity and density, calcification, and vascular, hilar, and perihepatic involvement. The diagnosis was confirmed histopathologically in all patients.
Six patients had solitary lesions, and one displayed multiple lesions. The lesions were generally seen as heterogeneous and hyper- or hypoechoic when imaged with color Doppler US, hypodense with CT, and hypointense with MRI, in comparison with the liver parenchyma. Calcification, central necrosis, and small peripheral cysts were observed in six, seven, and four patients, respectively. Vascular flow or contrast enhancement was not observed in any of the cases. A look at the respective advantages of each method reveals that calcification was best rendered visible via CT, small peripheral cysts with T2-weighted MRI, central necrosis with CT and MRI, and perihepatic invasion with multiplanar MRI. Vascular involvement was revealed by all methods.
Color Doppler US, CT, and MR imaging function extremely well as complementary methods in the diagnosis of HAE. Color Doppler US should be performed in these patients owing to its ability to efficiently detect the disease. Knowledge of imaging characteristics makes it possible to radiologically ascertain an early diagnosis.
利用彩色多普勒超声、CT和MRI确定并比较肝泡型包虫病的影像学特征。
对7例肝泡型包虫病患者进行了腹部CT、有无造影剂的MRI及彩色多普勒超声检查。对病变的位置、回声特征、强度和密度、钙化以及血管、肝门和肝周受累情况进行评估。所有患者均经组织病理学确诊。
6例患者为单发病变，1例为多发病变。与肝实质相比，彩色多普勒超声成像时病变通常表现为不均匀、高回声或低回声，CT表现为低密度，MRI表现为低信号。分别有6例、7例和4例患者观察到钙化、中央坏死和小的周边囊肿。所有病例均未观察到血管血流或造影剂增强。观察每种方法的各自优势发现，钙化通过CT显示最佳，小的周边囊肿通过T2加权MRI显示最佳，中央坏死通过CT和MRI显示最佳，肝周侵犯通过多平面MRI显示最佳。所有方法均显示有血管受累。
彩色多普勒超声、CT和MR成像在肝泡型包虫病的诊断中作为互补方法发挥着极佳的作用。由于彩色多普勒超声能够有效检测该病，因此应在这些患者中进行此项检查。了解影像学特征有助于通过放射学手段做出早期诊断。
