Prolapse of the fallopian tube after hysterectomy associated with exuberant angiomyofibroblastic stroma response: a diagnostic pitfall

We report two cases of prolapse of the fallopian tube associated with an ex uberant angiomyofibroblastic stroma response, which occurred after hysterec tomy and which is a hitherto unreported feature of this lesion. The tumors were composed of richly vascularized stroma arranged in a retiform pattern and mildly atypical glandular inclusions, which had the morphology of tubal epithelium. The stroma of the lesion was composed of either thin bipolar c ells with tapered nuclei and stellate-shaped cells with minimal amount of c ytoplasm or small epithelioid-looking cells with eosinophilic cytoplasm. Th e tubal glandular inclusions displayed mildly atypical nuclear features. If the tubal. glandular component was overlooked, these tumors might be erron eously diagnosed as mesenchymal lesions of the vagina, such as vaginal fibr oepithelial polyp, angiomyofibroblastoma, aggressive angiomyxoma, or superf icial myofibroblastoma.