Torashima M, Yamashita Y, Matsuno Y, Takahashi M, Nakahara K, Onitsuka Y, Ohtake H, Tanaka N, Okamura H
Department of Radiology, Kumamoto University School of Medicine, Honjo, Japan.
J Magn Reson Imaging. 1998 Mar-Apr;8(2):427-31. doi: 10.1002/jmri.1880080224.
Flow voids are occasionally seen between the uterus and the leiomyoma. This study was performed to determine the prevalence of this sign and its relation to tumor size and location, internal signal intensity of the leiomyomas, and the ease of detectability using different MR sequences. Also, to understand the pathologic causes for the phenomenon of flow voids. The MR images of the pelvis in 92 females with 359 uterine leiomyomas were analyzed. Flow voids located between the uterus and the leiomyomas were seen in 32 lesions on T1-weighted images and in 12 on T2-weighted images. Flow void was seen exclusively in leiomyomas of 3-cm diameter or larger. In five pedunculated subserous leiomyomas, flow voids were seen within the pedicle of the tumor. Large leiomyomas and leiomyomas with irregular signal intensity on T2-weighted images showed significantly greater frequency of signal void than other leiomyomas (P < .01). The sign was not seen in any other pelvic tumors. On pathologic evaluation, the flow voids were found to correspond to dilated feeding arteries located outside the capsule of the leiomyoma.
在子宫和平滑肌瘤之间偶尔可见血流空洞。本研究旨在确定该征象的发生率及其与肿瘤大小、位置、平滑肌瘤内部信号强度以及使用不同磁共振序列时的可检测性的关系。同时，了解血流空洞现象的病理原因。分析了92例患有359个子宫平滑肌瘤的女性的盆腔磁共振图像。在T1加权图像上，32个病灶可见子宫和平滑肌瘤之间的血流空洞，在T2加权图像上有12个可见。血流空洞仅见于直径3厘米或更大的平滑肌瘤。在5个带蒂浆膜下平滑肌瘤中，在肿瘤蒂内可见血流空洞。大的平滑肌瘤以及在T2加权图像上信号强度不规则的平滑肌瘤出现信号空洞的频率明显高于其他平滑肌瘤（P <.01）。在任何其他盆腔肿瘤中均未见到该征象。经病理评估，发现血流空洞对应于位于平滑肌瘤包膜外的扩张供血动脉。
