Fallopian tube endometrioid carcinoma

Background: Carcinoma of the fallopian tube is extremely uncommon neoplasm, accounting for only 0.3% of gynecologic cancers. Case: A 17-year-old female patient presented with clinical symptoms of right side deep pelvic pain. Ultrasound examination reveals right adenxal mass with breakdown suggesting neoplastic lesion or tubo-ovarian abscess. She was diagnosed clinically as tubo-ovarian mass for histopathological verification of its nature and prepared for surgery. There was a large soft tissue lesion arising in the middle of the right fallopian tube. Histopathological analysis of the specimen revealed neoplastic growth formed of malignant glands and acini of endometrioid pattern. Conclusion: Most tubal endometrioid carcinomas resemble the endometrial counterpart histologically. Involvement of tubal serosa, of the ovary or corpus uteri or other pelvic and abdominal structures indicate a poor prognosis.