磁共振成像在单纯型卵巢未成熟畸胎瘤中的应用：系列病例 8 例。
Magnetic resonance imaging of pure ovarian dysgerminoma: a series of eight cases.
机构信息
Department of Radiology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Via Albertoni 15, Bologna, Italy.
Division of Radiology 1, S. Maria della Misericordia Hospital, Perugia, Italy.
出版信息
Cancer Imaging. 2021 Oct 28;21(1):58. doi: 10.1186/s40644-021-00427-1.
BACKGROUND
Imaging findings have a prominent role in early and correct identification of ovarian dysgerminoma, the most common ovarian malignant germ cell tumor (OMGCT). Despite Computed Tomography (CT) is widely used, Magnetic Resonance Imaging (MRI) has proved to be superior in adnexal masses characterization. Limited data and small series are available concerning MRI aspects of dysgerminoma.
CASE PRESENTATION
From January 2012 to December 2018, a database of solid ovarian masses was retrospectively reviewed. Eight patients with histologically proven pure ovarian dysgerminoma and complete imaging available were identified and analyzed. Imaging findings were evaluated separately by two radiologists expert in female genito-urinary MRI.
CONCLUSIONS
MRI findings of a lobulated, purely solid, encapsulated mass with hyper-intensity of lobules and hypo-intensity of septa on T2w images contribute to differentiate dysgerminomas from other ovarian neoplasms.
背景
影像学表现对于早期准确识别卵巢未成熟畸胎瘤（最常见的卵巢恶性生殖细胞肿瘤[OMGCT]）起着重要作用。尽管计算机断层扫描（CT）广泛应用，但磁共振成像（MRI）已被证明在附件肿块特征方面更具优势。关于畸胎瘤的 MRI 表现，相关数据有限，且多为小系列研究。
病例介绍
自 2012 年 1 月至 2018 年 12 月，回顾性分析了一份实性卵巢肿块的数据库。共确定并分析了 8 例经组织学证实为单纯性卵巢未成熟畸胎瘤且影像学资料完整的患者。两名精通女性泌尿生殖系统 MRI 的放射科医生分别对影像学表现进行评估。
结论
MRI 表现为分叶状、单纯实性、包膜完整的肿块，T2w 图像上的分叶呈高信号，间隔呈低信号，有助于将未成熟畸胎瘤与其他卵巢肿瘤区分开来。
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