Urogenital

European Radiology

, Volume 16, Issue 12, pp 2700-2711

First online:

MR features of physiologic and benign conditions of the ovary

  • Ken TamaiAffiliated withDepartment of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University
  • , Takashi KoyamaAffiliated withDepartment of Radiology, Kyoto University Hospital Email author 
  • , Tsuneo SagaAffiliated withDepartment of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University
  • , Aki KidoAffiliated withDepartment of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University
  • , Masako KataokaAffiliated withDepartment of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University
  • , Shigeaki UmeokaAffiliated withDepartment of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University
  • , Shingo FujiiAffiliated withDepartment of Gynecology and Obstetrics, Graduate School of Medicine, Kyoto University
  • , Kaori TogashiAffiliated withDepartment of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University

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Abstract

In reproductive women, various physiologic conditions can cause morphologic changes of the ovary, resembling pathologic conditions. Benign ovarian diseases can also simulate malignancies. Magnetic resonance imaging (MRI) can play an important role in establishing accurate diagnosis. Functional cysts should not be confused with cystic neoplasms. Corpus luteum cysts typically have a thick wall and are occasionally hemorrhagic. Multicystic lesions that may mimic cystic neoplasms include hyperreactio luteinalis, ovarian hyperstimulation syndrome, and polycystic ovary syndrome. Recognition of clinical settings can help establish diagnosis. In endometrial cysts, MRI usually provides specific diagnosis; however, decidual change during pregnancy should not be confused with secondary neoplasm. Peritoneal inclusion cysts can be distinguished from cystic neoplasms by recognition of their characteristic configurations. Ovarian torsion and massive ovarian edema may mimic solid malignant tumors. Recognition of normal follicles and anatomic structures is useful in diagnosing these conditions. In pelvic inflammatory diseases, transfascial spread of the lesion should not be confused with invasive malignant tumors. Radiologic identification of abscess formation can be a diagnostic clue. Many benign tumors, including teratoma, Brenner tumor, and sex-cord stromal tumor, frequently show characteristic MRI features. Knowledge of MRI features of these conditions is essential in establishing accurate diagnosis and determining appropriate treatment.

Keywords

MRI Ovary Physiologic change Benign condition