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Korean J Pathol. 2012 Oct;46(5):494-8. doi: 10.4132/KoreanJPathol.2012.46.5.494. Epub 2012 Oct 25.

Cellular pseudosarcomatous fibroepithelial stromal polyp of the vagina during pregnancy: a lesion that is overdiagnosed as a malignant tumor.

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  • 1Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.


Fibroepithelial stromal polyp (FSP) is a benign lesion that can occur at various sites, including the lower female genital tract. In rare cases, however, it may exhibit hypercellularity, bizarre cytomorphological features, and atypical mitoses resulting in an overdiagnosis as a malignant tumor despite its benign clinical course. Recently, we experienced one case of a 30-year-old pregnant woman with cellular pseudosarcomatous FSP that was initially diagnosed as a malignant fibrous histiocytoma at a primary clinic. In addition to describing the rare features of this case, we wish to increase awareness about this benign lesion which will be essential for avoiding unnecessary radical surgery or chemoradiation treatment.


Fibroepithelial polyp; Pregnancy; Vagina

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