ISSN: 2474-9230
Authors: Sarabia-Ochoa R*, Garcia-de la Torre JP and Amezcua-Recover A
Background: Endometrial stromal nodules involving the placental membranes are exceptionally rare. Only two cases have been described in the literature. We report a new case of endometrial stromal nodule with intense decidual changes as an incidental finding during delivery of the placenta. Case: A 31-years-old female patient with no history of interest presented after a normal term delivery, a 3.5 x 2.6 x 1cm well circumscribed nodule independent of the placenta and not attached to it. The tumor was asymptomatic and was not identificated ultrasonographically. Microscopically, the neoplastic nodule was composed of spindle and epithelioid cells with extensive eosinophilic cytoplasm with a decidualized appearance without associated glands, except for minimal epithelial remnants in the periphery. Characteristic features of endometrial stromal tumor were identified, such as CD10, WT-1, and progesterone receptor positivity, and an expanding noninfiltrating linear pushing rim. There were also pregnancy-related changes, such as decidualization and myxoid change. The lesion was considered a endometrial stromal nodule with an unusual morphology and increased proliferation rate due to the hormonal stimuli of pregnancy. Conclusion: We report a rare case of an incidental endometrial stromal nodule during delivery of the placenta, representing only the third such case reported in the world literature. In all likelihood, this neoplasm originated from the decidua of the free membranes.
Keywords: Endometrial Stromal Tumor; Endometrial Stromal Nodule; Placenta
