Concurrent Primary Peritoneal Low-Grade Serous Carcinoma and Endometrial High-Grade Serous Carcinoma

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 .....We believe this is the first reported case of synchronous primary peritoneal low-grade serous carcinoma and a (high-grade) serous carcinoma of endometrium. Although this may be an incidental finding, it may also indicate a common histogenetic pathway for these tumors. Additional cases and further studies are required for the evaluation of this hypothesis.