Open Access

Bilateral and multiple mixed epithelial and stromal tumors of the kidney: A case report

  • Authors:
    • Ryo Minoda
    • Toshio Takagi
    • Naohiro Toda
    • Hiroko Itagaki
    • Tsunenori Kondo
    • Hideki Ishida
    • Yoji Nagashima
    • Kazunari Tanabe
  • View Affiliations

  • Published online on: October 6, 2017     https://doi.org/10.3892/mco.2017.1444
  • Pages:1005-1007
  • Copyright: © Minoda et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Mixed epithelial and stromal tumor (MEST) of the kidney is a benign tumor occurring predominantly in older women. Histologically, MEST comprises tubuloglandular and cystic structures in an ovarian‑like stroma. Bilateral and multiple cases are rare. We herein present a case of bilateral and multiple MEST in a 43‑year‑old woman. The patient presented with gross hematuria and was referred to a primary care physician. A computed tomography scan revealed 5 tumors in the right and 2 in the left kidney. Renal cell carcinoma was suspected, and left partial nephrectomy followed by right radical nephrectomy was planned. After the left partial nephrectomy, the histopathological diagnosis was MEST, which was consistent with the results obtained following needle biopsy. Therefore, the contralateral tumor was also suspected to be MEST, and needle biopsy was performed. The histopathological diagnosis was identical and the right kidney was spared. The patient is currently periodically monitored. As MEST is a benign tumor, preoperative diagnosis is crucial for avoiding overtreatment.

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December 2017
Volume 7 Issue 6

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APA
Minoda, R., Takagi, T., Toda, N., Itagaki, H., Kondo, T., Ishida, H. ... Tanabe, K. (2017). Bilateral and multiple mixed epithelial and stromal tumors of the kidney: A case report. Molecular and Clinical Oncology, 7, 1005-1007. https://doi.org/10.3892/mco.2017.1444
MLA
Minoda, R., Takagi, T., Toda, N., Itagaki, H., Kondo, T., Ishida, H., Nagashima, Y., Tanabe, K."Bilateral and multiple mixed epithelial and stromal tumors of the kidney: A case report". Molecular and Clinical Oncology 7.6 (2017): 1005-1007.
Chicago
Minoda, R., Takagi, T., Toda, N., Itagaki, H., Kondo, T., Ishida, H., Nagashima, Y., Tanabe, K."Bilateral and multiple mixed epithelial and stromal tumors of the kidney: A case report". Molecular and Clinical Oncology 7, no. 6 (2017): 1005-1007. https://doi.org/10.3892/mco.2017.1444