Vaginal spindle cell epithelioma: A first complete MRI and histopathologic description


      • Vaginal spindle cell epitheliomas are rare, benign tumors.
      • MRI characteristics include T1 isointensity, T2 hyperintensity, homogeneous enhancement, and diffusion restriction.
      • Histology includes epithelial and mesodermal markers with possible Mullerian, urogenital sinus, or pluripotential origins.
      • These lesions are no longer considered mixed tumors of myoepithelial origin.
      • Management is complete surgical resection.


      Spindle cell epithelioma of the vagina is a benign entity with fewer than sixty cases described in the literature, and only two with limited imaging findings, since the early 1950s. Early pathology literature suggested the lesions were mixed tumors of myoepithelial origin, but subsequent studies have found relatively few immunohistochemical characteristics in common with other mixed cell tumors. More recently, Mullerian, urogenital sinus epithelial, and pluripotential cell origins have been proposed. Given lesion rarity and a typical lack of imaging before excision, the imaging appearance of vaginal spindle cell epitheliomas has not been fully described in the radiology literature, and without comprehensive pathology correlation. The authors describe a case of spindle cell epithelioma in a 54-year-old woman which was incidentally discovered on MRI performed for uterine fibroid embolization planning. Pathology and immunohistochemistry confirmed the diagnosis.


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