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        Unenhanced region on magnetic resonance imaging represents tumor progression in uterine carcinosarcoma

        Ayami Inoue,Ken Yamaguchi,Yasuhisa Kurata,Ryusuke Murakami,Kaoru Abiko,Junzo Hamanishi,Eiji Kondoh,Tsukasa Baba,Aki Kido,Ikuo Konishi,Noriomi Matsumura 대한부인종양학회 2017 Journal of Gynecologic Oncology Vol.28 No.5

        Objective: Carcinosarcoma of the uterine corpus has a poor prognosis. Although pathologicalnecrosis is a prognostic factor of endometrial cancer, the clinicopathological influences of anunenhanced region observed on magnetic resonance imaging (MRI) are inconclusive. The aimof our study was to determine the clinicobiological impact of the presence of an unenhancedregion on MRI, which can represent necrosis, in uterine carcinosarcoma. Methods: The clinicopathological factors of 29 patients diagnosed with uterinecarcinosarcoma were assessed retrospectively. The percentage of the tumor that wasunenhanced on MRI was determined. The clinicopathological factors related to theunenhanced regions were evaluated. The prognostic significance was assessed using theKaplan-Meier method and Cox regression model. Results: Although the presence of pathological necrosis was not a poor prognosticfactor (p=0.704), unenhanced regions on MRI correlated with poor prognosis when theunenhanced regions in the tumor accounted for more than 10% of the total tumor (p=0.019). The percentage of unenhanced regions was positively correlated with stage (p=0.028;r=0.4691) and related to tumor size (p=0.086; r=0.3749). The Cox regression analysisindicated that the presence of lymph node (LN) metastasis and more than 10% of the tumorbeing unenhanced on MRI were prognostic factors of overall survival in the univariateanalyses (p=0.018 and p=0.047, respectively). Conclusion: The unenhanced region on MRI, which represents pathological necrosis, reflectstumor progression, and semi-quantification of the region is useful to predict the prognosis inpatients with uterine carcinosarcoma.

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