Serous carcinoma of a prolapsed fallopian tube: A rare cause of a vaginal apex mass

BACKGROUND: The differential diagnosis for women who present with a vaginal mass after undergoing a hysterectomy is dependent on the indication, type and timing of the hysterectomy. The differential diagnosis includes cervical dysplasia, malignancy, nabothian cysts, prolapsed endocervical polyp/fibroid, abscess, hematoma, granulation tissue, or dehiscence with organ evisceration. CASE: We introduce a case of a woman who presented with a vaginal apex mass and had a remote history of a total hysterectomy for an unknown indication. She was ultimately diagnosed with high grade serous carcinoma of a prolapsed fallopian tube. CONCLUSION: This is the first reported case of serous carcinoma of a prolapsed fallopian tube and highlights the importance of maintaining a wide differential diagnosis for women who present with vaginal apex masses.