Kawakami S, Togashi K, Konishi I, Kimura I, Fukuoka M, Mori T, Konishi J
Department of Radiology, Kyoto University, Faculty of Medicine, Japan.
J Comput Assist Tomogr. 1994 Nov-Dec;18(6):925-8. doi: 10.1097/00004728-199411000-00014.
Red degeneration (hemorrhagic infarction) of uterine leiomyoma can cause acute abdominal pain. This study was undertaken to identify MR features useful in diagnosing this rare complication of uterine leiomyoma.
Magnetic resonance imaging from five patients symptomatic for 7 to 20 days with pathologic confirmation of red degeneration was retrospectively evaluated and correlated with histopathologic findings.
The lesions had a common MRI appearance: hyperintense rim on T1-weighted imaging (WI) and hypointense rim on T2-WI. These findings corresponded with numerous dilated vessels filled with red blood cells at the periphery of the lesion. The signal characteristics of the rim are best explained as an effect of abundant intracellular methemoglobin in these vessels.
Recognition of these characteristics may help radiologists differentiate symptomatic red degeneration from other clinical conditions that need surgical interventions.
子宫平滑肌瘤红色变性（出血性梗死）可引起急性腹痛。本研究旨在确定有助于诊断子宫平滑肌瘤这种罕见并发症的磁共振成像（MR）特征。
回顾性评估了5例有7至20天症状且经病理证实为红色变性患者的磁共振成像，并将其与组织病理学结果进行关联。
病变具有共同的MRI表现：在T1加权成像（WI）上为高信号边缘，在T2-WI上为低信号边缘。这些表现与病变周边大量充满红细胞的扩张血管相对应。边缘的信号特征最好解释为这些血管中丰富的细胞内高铁血红蛋白的作用。
认识到这些特征可能有助于放射科医生将有症状的红色变性与其他需要手术干预的临床情况区分开来。
