Residual oil-based iodinated contrast medium accumulation that mimicked an abdominal foreign body, following an emergency cesarean delivery : a case report

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  • 緊急帝王切開術後のレントゲン検査で腹腔内異物との鑑別を要したヨード油性造影剤残留の1例
  • キンキュウ テイオウ セッカイ ジュツゴ ノ レントゲン ケンサ デ フクコウ ナイ イブツ ト ノ カンベツ オ ヨウシタ ヨード ユセイゾウエイザイ ザンリュウ ノ 1レイ

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<p>Oil-based iodinated contrast media are widely used for hysterosalpingography. Oil-based iodinated contrast media can remain in the body for extended periods of time, which can show a CT value similar to that of metal on radiographic evaluation, which may result in misdiagnosis of such lesions postoperatively. We describe a patient with a history of hysterosalpingography, who presented with a shadow that was misdiagnosed as a metallic foreign body on radiography performed after cesarean delivery. The patient conceived after thawed blastocyst transplantation. She underwent an emergency cesarean delivery, and postoperative radiography revealed a pelvic mass with a clear margin and an area of uniformly high absorption. Computed tomography (CT) revealed a suspected foreign body on the right side of the Douglas fossa with a CT value of 3000 Hounsfield units (HU), which was comparable to that of metal. The patient’s re-interview revealed a history of hysterosalpingography ; therefore, based on a literature review, we strongly suspected residual contrast medium in the abdominal cavity, and the patient was followed-up without any intervention, per our hospital policy. Subsequent radiography revealed deformation and reduction in the size of the shadow, and the patient was diagnosed with residual oil-based iodinated contrast medium in the abdominal cavity. It is necessary to remember the possibility of residual contrast media in patients with a history of hysterosalpingography. [Adv Obstet Gynecol, 74(1) : 166-170, 2022 (R4.2)]</p>

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