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A male case of primary retroperitoneal mucinous cystadenoma: a diagnostic dilemma

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Abstract

We report a male case of primary retroperitoneal mucinous cystadenoma (PRMC) that was at initially misdiagnosed as a complicated renal cyst. On ultrasonography, a71-year-old man was found to have an abdominal mass suspicious for right renal cyst. The initial computed tomography scan showed an unenhanced, low-density mass that deformed the edge of the right kidney into a beak shape. Four years later, the mass had increased in size. Magnetic resonance imaging revealed a cystic lesion. Its intracystic content showed relatively high intensity on a T1-weighted image, and the coronal gadolinium-enhanced T1-weighted image with fat suppression clearly showed a multilocular cystic mass without enhancing mural nodules. The final diagnosis of PRMC was obtained pathologically after surgery. Because PRMC has malignant potential, this rare entity should be considered when a retroperitoneal cystic tumor is evaluated, even in a male patient.

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Acknowledgments

We thank Drs. Kousei Ishigami, Daisuke Kakihara, Yasuhiro Ushijima, Yukihisa Takayama, and Torahiko Yamanouchi, Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, for analyzing image findings for this manuscript.

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Authors and Affiliations

  1. Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan

    Nobuhiro Fujita, Akihiro Nishie, Yoshiki Asayama & Hiroshi Honda

  2. Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan

    Keijiro Kiyoshima

  3. Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan

    Yuichiro Kubo

Authors
  1. Nobuhiro Fujita
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  2. Akihiro Nishie
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  3. Yoshiki Asayama
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  4. Keijiro Kiyoshima
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  5. Yuichiro Kubo
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  6. Hiroshi Honda
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Correspondence to Akihiro Nishie.

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Fujita, N., Nishie, A., Asayama, Y. et al. A male case of primary retroperitoneal mucinous cystadenoma: a diagnostic dilemma. Jpn J Radiol 30, 594–597 (2012). https://doi.org/10.1007/s11604-012-0083-6

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  • DOI: https://doi.org/10.1007/s11604-012-0083-6

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