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Metastasis from breast carcinoma to a tamoxifen-related endometrial polyp
Mustafa Fuat Acikalin1, Ulkü Oner, Basar Tekin
1Osmangazi University Medical Faculty, Department of Pathology, Eskişehir, Turkey. acikalin@ogu.edu.tr
Background:
Metastasis of extragenital neoplasms to an endometrial polyp is rare and until now, only 6 cases of such involvement has been described.
Case:
A 58-year-old woman, who had been diagnosed 4 years ago with infiltrating ductal breast carcinoma and treated with surgery and tamoxifen therapy, was admitted to the gynecology clinic because of endometrial thickening observed during a routine abdominal ultrasonographic examination. A total hysterectomy with bilateral salpingo-oophorectomy was performed. Pathological examination of the specimen showed a large polyp which microscopically showed clusters of cells with signet ring morphology within the polyp stroma. The positivity of tumor cells for GCDFP-15 supported the diagnosis of metastatic breast carcinoma to endometrial polyp.
Conclusion:
Metastatic breast carcinoma should be considered in the differential diagnosis of carcinomas with signet ring cell morphology involving uterus.
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