Abstract
We seldom encounter metastatic breast cancer from other organs. Placental site trophoblastic tumor (PSTT) is the rarest type of gestational trophoblastic tumor. We document a case of very rare isolated metastasis of PSTT to the mammary gland.
A 40-year-old woman was seen at the hospital because of right breast mass in February 17, 1998. There was a previous history of undergoing an abdominal total hysterectomy for PSTT in July, 1993. The patient had been disease free after postoperative chemotherapy until the breast mass was noticed. On admission the tumor was cystic and effusion from it was detected. Repeated punctures of the mass revealed that the effusion was not malignant. Since no decrease in effusion was attained, a partial resection of the right breast was performed for curative therapy as well as etiological exploration on July 30, 1998. Pathological examination revealed it was the metastasis of PSTT. On systemic examination, no other metastasis was detected.
