Difficult diagnosis in a patient with no virilizing symptoms of a benign ovarian steroid cell tumor that showed high <sup>18</sup>F-fluorodeoxyglucose (<sup>18</sup>F-FDG) uptake by positron emission tomography (<sup>18</sup>F-PET)

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  • UMESAKI Naohiko
    Department of Gynecology, Izumi City General Hospital
  • YAMAUCHI Makoto
    Department of Obstetrics and Gynecology, Osaka City University Graduate School of Medicine
  • NAKANO Yusuke
    Department of Medical Oncology, Izumi City General Hospital
  • MIYAMA Masato
    Department of Gynecology, Izumi City General Hospital
  • INOUE Yutaka
    Department of Gynecology, Izumi City General Hospital
  • MATSUDA Makiko
    Department of Gynecology, Izumi City General Hospital
  • OKIMURA Akira
    Department of Clinical Pathology, Tokyo Medical University Hachioji Medical Center

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  • <sup>18</sup>F-fluorodeoxyglucose （<sup>18</sup>F-FDG） positron emission tomography（PET，<sup>18</sup>F-PET）検査陽性で，男化現象を示さなかったため診断に苦慮した良性のステロイド細胞腫瘍の1例
  • 症例報告 ¹⁸F-fluorodeoxyglucose (¹⁸F-FDG) positron emission tomography (PET, ¹⁸F-PET)検査陽性で,男化現象を示さなかったため診断に苦慮した良性のステロイド細胞腫瘍の1例
  • ショウレイ ホウコク ¹ ⁸ F-fluorodeoxyglucose (¹ ⁸ F-FDG) positron emission tomography (PET, ¹ ⁸ F-PET)ケンサ ヨウセイ デ,オトコ ケゲンゾウ オ シメサナカッタ タメ シンダン ニ クリョ シタ リョウセイ ノ ステロイド サイボウ シュヨウ ノ 1レイ

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Abstract

<p>Ovarian steroid cell tumors (SCTs) are rare and account for 0.1% of ovarian tumors. Among patients affected by tumors, 56-77% have virilizing symptoms. This symptom is useful for detecting of SCT. The patient in the present study did not show any virilizing symptoms. Therefore, diagnosis of an SCT was difficult. Magnetic resonance imaging showed a heterogenous mass on T2-weighted imaging and hyperintensity on diffusion-weighted imaging in the right ovary. 18F-fluorodeoxyglucose (18F-FDG) positron emission tomography showed high 18F-FDG uptake (maximal standardized uptake value (SUV max) :17). Therefore, ovarian cancer was suspected. Before surgery, we measured testosterone levels to determine the possibility of ovarian sex cord-stromal tumor because she had amenorrhea for nine months and had a solid ovarian tumor. Exploratory laparotomy was performed for diagnosis of ovarian cancer or a sex cord-stromal tumor because the testosterone level was high. Intraoperative frozen section analysis showed a benign sex cord-stromal tumor and R oophorectomy was then performed. Histomorphology and immunohistochemistry of the tumor suggested the diagnosis of a benign ovarian SCT. Postoperatively, testosterone levels became normal in 1 week and menstruation appeared in 1 month. The patient continued to have a regular menstrual cycle and good health for 30 months. [Adv Obstet Gynecol, 72(2) : 88-95, 2020 (R2.5)]</p>

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