Asada Tatsunori, Yamada Takayuki, Kumano Reiko
Department of Radiology, St. Marianna University School of Medicine Yokohama City Seibu Hospital, 1197-1 Yasashicho, Asahi-ku, Yokohama, Kanagawa 241-0811, Japan.
Radiol Case Rep. 2019 Sep 5;14(11):1315-1319. doi: 10.1016/j.radcr.2019.08.012. eCollection 2019 Nov.
Ovarian leiomyoma is a rare benign tumor, seen mostly in women 20-65 years old. The case of a 51-year-old woman with a large tumor in the pelvic cavity is reported. The dominant feature of the tumor was its cystic component, but an irregular, solid component was recognized along the dorsal margin of the tumor. The latter area showed signal intensity as low as muscle on T2-weighted images and significant contrast enhancement; however, it did not show restricted diffusion, which implied that it was benign. The large tumor was resected because malignancy could not be ruled out, and it was pathologically diagnosed as ovarian leiomyoma with predominant necrosis. When a low-intensity component without malignant features is seen on magnetic resonance imaging, leiomyoma should be included in the differential diagnosis despite its rare occurrence in the ovary.
卵巢平滑肌瘤是一种罕见的良性肿瘤，多见于20至65岁的女性。本文报道了一例51岁女性盆腔内有一个大肿瘤的病例。该肿瘤的主要特征是其囊性成分，但在肿瘤的背侧边缘发现了一个不规则的实性成分。后者在T2加权图像上显示出与肌肉一样低的信号强度，并伴有明显的对比增强；然而，它没有显示出扩散受限，这表明它是良性的。由于不能排除恶性肿瘤的可能，故将这个大肿瘤切除，术后病理诊断为以坏死为主的卵巢平滑肌瘤。当在磁共振成像上看到一个没有恶性特征的低强度成分时，尽管平滑肌瘤在卵巢中很少见，但在鉴别诊断中也应考虑到。
