Dedifferentiated endometrial carcinoma: A report of three cases and review of the literature

  • Authors:
    • Ryo Yokomizo
    • Kyosuke Yamada
    • Yasushi Iida
    • Takako Kiyokawa
    • Kazu Ueda
    • Motoaki Saito
    • Nozomu Yanaihara
    • Mayo Nakamura
    • Aikou Okamoto
  • View Affiliations

  • Published online on: October 3, 2017     https://doi.org/10.3892/mco.2017.1437
  • Pages:1008-1012
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Abstract

Dedifferentiated endometrial carcinoma, which is defined microscopically as the co‑existence of undifferentiated carcinoma and grade 1 or 2 endometrioid adenocarcinoma, is an aggressive type of cancer regardless of the percentage of undifferentiated components. It is reported that undifferentiated carcinoma comprises 9% of endometrial carcinoma. The percentage of dedifferentiated endometrial carcinoma has been hypothesized to be 40% of undifferentiated carcinoma. A precise pathological diagnosis is essential for defining the appropriate therapeutic approach and prognosis. Furthermore, since there is an association between dedifferentiated endometrial carcinoma and Lynch syndrome, it is important to identify the patient's genetic background. The current case report presents three cases of dedifferentiated endometrial carcinoma treated in our hospital. In immunohistochemical staining for DNA mismatch‑repair (MMR) proteins in dedifferentiated endometrial carcinoma, the components of undifferentiated carcinoma demonstrated a loss of MMR protein expression, and it is suspected that there may be a germline mutation in these cases. Therefore, Lynch syndrome should be suspected and the appropriate genetic approaches in cases of dedifferentiated endometrial carcinoma should be considered.

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December 2017
Volume 7 Issue 6

Print ISSN: 2049-9450
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Copy and paste a formatted citation
APA
Yokomizo, R., Yamada, K., Iida, Y., Kiyokawa, T., Ueda, K., Saito, M. ... Okamoto, A. (2017). Dedifferentiated endometrial carcinoma: A report of three cases and review of the literature. Molecular and Clinical Oncology, 7, 1008-1012. https://doi.org/10.3892/mco.2017.1437
MLA
Yokomizo, R., Yamada, K., Iida, Y., Kiyokawa, T., Ueda, K., Saito, M., Yanaihara, N., Nakamura, M., Okamoto, A."Dedifferentiated endometrial carcinoma: A report of three cases and review of the literature". Molecular and Clinical Oncology 7.6 (2017): 1008-1012.
Chicago
Yokomizo, R., Yamada, K., Iida, Y., Kiyokawa, T., Ueda, K., Saito, M., Yanaihara, N., Nakamura, M., Okamoto, A."Dedifferentiated endometrial carcinoma: A report of three cases and review of the literature". Molecular and Clinical Oncology 7, no. 6 (2017): 1008-1012. https://doi.org/10.3892/mco.2017.1437