Chong-Han Crispina H, Cortez Selina C, Tung Glenn A
Department of Diagnostic Imaging, Brown University School of Medicine, Rhode Island Hospital, 593 Eddy St., Providence, RI 02903,USA.
AJR Am J Roentgenol. 2003 Dec;181(6):1711-4. doi: 10.2214/ajr.181.6.1811711.
This retrospective study reports the diffusion-weighted MRI appearance of Toxoplasma abscesses, rim-enhancing cerebral masses resulting from toxoplasmosis infection. In all patients, the signal intensity of the abscess core on diffusion-weighted MRI was equal to or less than that of normal, unaffected cerebral white matter and the measured apparent diffusion coefficient was greater than that of unaffected white matter. Histopathology revealed necrotic tissue in the center of these abscesses but no purulent fluid.
Unlike pyogenic abscesses, the core tissue of rim-enhancing Toxoplasma abscesses shows no restriction of water diffusion.
本回顾性研究报告了弓形虫脓肿在扩散加权磁共振成像（DWI）上的表现，弓形虫脓肿是由弓形虫感染引起的边缘强化脑肿块。在所有患者中，弓形虫脓肿核心在DWI上的信号强度等于或低于正常未受影响的脑白质，且测量得到的表观扩散系数大于未受影响的白质。组织病理学显示这些脓肿中心为坏死组织，但无脓性液体。
与化脓性脓肿不同，边缘强化的弓形虫脓肿的核心组织未显示水扩散受限。
