High-grade serous ovarian cancer 3 years after bilateral salpingectomy: A case report.

Although epithelial ovarian cancer commonly originates from the ovarian surface epithelium and/or ovarian inclusion cysts, it was recently proposed that high-grade serous ovarian cancer (HGSC) develops from the Fallopian tubes. In our department, we encountered a case of HGSC that contradicts the hypothesis of a tubal origin for HGSC. A 51-year-old postmenopausal woman had undergone hysterectomy, left oophorectomy and bilateral salpingectomy for uterine myoma. Three years later, the patient was diagnosed with stage IV ovarian cancer and underwent primary debulking surgery. The pathological examination revealed HGSC, although there was no evidence of serous tubal intraepithelial carcinoma or any other type of cancer in the previously resected left ovary and bilateral Fallopian tubes. Moreover, p53 overexpression was not detected in the right ovarian cancer specimen, while paired box gene 8, a marker of Fallopian tube epithelium, was highly expressed. Therefore, HGSC may develop from an inclusion cyst with metaplasia of from the ovarian surface epithelium.