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ABSTRACT: Primary fallopian tube carcinoma is a very rare gynaecologic malignant tumour and accounts for approximately 0.14?1.8% of female genital malignancies. Histologic, molecular and genetic evidence shows that 60?70% of tumours that were classifed as high-grade serous carcinomas of the ovary or peritoneum might have originated in the distal fimbrial end of the fallopian tube. A 54-year-old post-menopausal female presented to the gynaecology OPD with complaints of pain in her abdomen for 5?6?months, relieved partially on medication, bloating for 3?months and abdominal distension for 2?months. The patient was planned for a primary cytoreductive surgery with Staging Laparotomy with Total Abdominal Hysterectomy with Bilateral Salpingo-Oophorectomy with Infracolic Omentectomy with retroperitoneal lymph node dissection. The final histopathology report showed primary high-grade serous cystadenocarcinoma of the fallopian tube spread to bilateral ovaries and omentum. It is important to realise that the origin of a majority of serous cancers is from the distal fimbrial end of the fallopian tube, and thus, it is a partially preventable cause of high-grade serous cancers. This needs to be translated into the reporting by pathologists and subsequently to find out the true incidence of fallopian tube cancers.