Neuroendocrine Tumor of the Fallopian Tube and Serous Adenocarcinoma of the Ovary: Multicentric Primary Tumors

Neuroendocrine tumors (NETs) comprise a large group of tumors that are most often localized in the gastrointestinal tract and lungs. They are rarely found in the organs of the female reproductive tract; such NETs are primarily localized in the ovaries. We present a case of multicentric primary low-grade NET of the fallopian tube and high-grade ovarian serous adenocarcinoma. In both tumor regions, the histotypes of neoplasms were determined by morphological and immunohistochemical investigations. The NET of the fallopian tube was diffusely positive for chromogranin A and CD56, but wild type for p53 and negative for CK7, CK20, and ER; Ki-67 expression was observed in 3% of the neoplastic cells. The ovarian serous adenocarcinoma was positive for CK7 and ER, mutant for p53, but negative for chromogranin A, CK20, and CD56; Ki-67 expression was observed in 45% of the tumor cells. These results support the possibility that NET can occur in the female reproductive tract and coexist with other malignant tumors.

Serous borderline tumor with distant mediastinal metastasis? An Exceptional presentation of ovarian tumor

Borderline ovarian tumor is a non-invasive lesion with an excellent prognosis. Here we report a case of 48-year-old woman with distinctive clinical presentation of metastasis of ovarian adenocarcinoma, which was an microinvasive component of a serous borderline tumor. On initial diagnosis patient did not present any clinical manifestation of ovarian tumor. Histological examination of resected ovary showed typical features of the serous borderline tumor with one very diminutive focus of invasive serous adenocarcinoma 4mm in diameter. This exceptional case shows that borderline tumors of ovary with any features of invasion could present an aggressive course with distant metastases.