• Mengying Ji, Yichao Jin, Xing Chen, Yujing Li, Juveria Rahman, and Huihua Dai.
• Department of Gynecology, the First Affiliated Hospital with Nanjing Medical University, Nanjing, China.
• Medicine (Baltimore). 2022 Aug 26; 101 (34): e30228.

RationaleMucosa-associated lymphoid tissue (MALT) lymphoma accounts for 7%-8% of newly diagnosed lymphomas. The stomach is the most common organ of origin (nearly 50% of MALT lymphomas). Only 2% of MALT lymphomas arise from the female genital tract, and most originated from uterus. We described a rare case of MALT lymphoma primarily arising from the fallopian tube.Patient ConcernsA 26-year-old woman was brought into our gynecological clinic because of a history of irregular menstruation. The transvaginal ultrasonography revealed cystic masses in bilateral adnexa and both of them showed rich vasculature. Laboratory tests showed a high level (455.3 U/mL) of cancer antigen-125 (CA-125).InterventionsA laparoscopy was performed.OutcomesFrozen section of the removed specimen revealed acute and chronic inflammation with abundant inflammatory cells infiltrating the mesenchyme. The right fallopian tube was removed. However, the final histological results showed inflammation accompanied by hyperplasia of lymphoid tissue. Immunohistochemistry staining were consistent with MALT lymphoma. The patient received the second surgery to remove the left fallopian tube and also confirmed the same pathology.LessonsGynecologists should be aware of cystic masses which showed rich vasculature and high level of CA-125.Copyright © 2022 the Author(s). Published by Wolters Kluwer Health, Inc.

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