Epithelioid trophoblastic tumor is a neoplasm of the chorionic-type intermediate trophoblasts. It is considered a rare gestational trophoblastic disease and is frequently misdiagnosed as carcinoma. Extrauterine epithelioid trophoblastic tumor has been reported in multiple anatomical sites. We report a case of a 50-year-old woman who presented with abdominal pain and distension. Her initial β-human chorionic gonatotropin level was 806.7 IU/L. Imaging showed a large complex ovarian mass with peritoneal and subcapsular hepatic deposits as well as pulmonary nodules. Morphological features of the tumor and its immunohistochemical reactivity to CK8/18, CK7, p63, and CD10 were consistent with the diagnosis of an extrauterine epithelioid trophoblastic tumor arising from the ovary. The differential diagnoses, including other ovarian tumors, were ruled out on the basis of morphology and negative immunostaining to a relatively extended panel of antibodies. A prolonged follow up of these cases and the recognition of such rare tumors in unusual sites are crucial to the diagnosing pathologist and treating physician.
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Article Synopsis
- A study was conducted to review a rare type of tumor known as Atypical Placental Site Nodule (APSN), particularly focusing on a case of a post Cesarean Section cyst and fistula that shared features with both placental site nodule and epithelioid trophoblastic tumor.
- Researchers searched databases like PubMed and Web of Science for similar cases, specifically those with cyst or fistula formations after Cesarean sections, broadening their search due to the limited understanding of "atypical epithelioid trophoblastic lesion."
- The results highlighted eight similar cases documented in literature, showcasing symptoms like vaginal bleeding and abdominal pain, with most cases showing high Ki-67 proliferation indices but no sign
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