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CASE REPORT article

Front. Surg., 31 March 2023
Sec. Obstetrics and Gynecological Surgery

Leiomyoma of the fallopian tube found during laparoscopic myomectomy: A case report and review of the literature

\r\nBing ChengBing ChengRui WangRui WangYaoqun FuYaoqun FuXi Fu
\r\nXi Fu*
  • Department of Obstetrics and Gynecology, Center for Reproductive Medicine/Department of Fetal Medicine and Prenatal Diagnosis/BioResource Research Center, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China

Leiomyoma of the fallopian tube is an extremely rare benign tumor of the fallopian tube. Because of the small number of cases, it is difficult to calculate their incidence. In this case report, we report a case of leiomyoma of the fallopian tube detected during laparoscopic myomectomy in a 31-year-old female with occasional pelvic pain. The patient was diagnosed with uterine leiomyoma based on a transvaginal ultrasound scan. She was operated and a 3*3 cm mass in the area of the isthmus of the left fallopian tube was observed. Three uterine leiomyomas and one leiomyoma of the fallopian tube were removed. Ultrasound at 6 months postoperatively showed no abnormality. Hysterosalpingo-contrast-sonography (HyCoSy) at 15 months postoperatively showed bilateral fallopian tubes were unobstructed. For those patients with fertility requirements, some fertility-preserving techniques can be used to allow complete resection of the leiomyoma and avoid tubal damage.

Introduction

Leiomyoma of the fallopian tube, a benign tumor, is extremely rare in contrast to other gynecologic tumors (1). Most leiomyoma of the fallopian tube are asymptomatic, however, some of them may experience abdominal pain or ectopic pregnancy (2, 3). They are usually discovered accidentally during diagnostic laparoscopy or unrelated surgical procedures (2, 4, 5). However, there are few images of it.

Case report

A 31-year-old Chinese woman, gravida 0, para 0, diagnosed with uterine leiomyoma was admitted to our hospital for surgery. She discovered a 1*1 cm uterine leiomyoma during a physical examination 5 years ago. During her follow-up, the leiomyomas gradually increased in size and increased in number. She had occasional pelvic pain, without previous surgery. Menstruation is normal. A transvaginal ultrasound scan showed multiple uterine leiomyomas, the largest was about 62*42 mm (Figure 1A).

FIGURE 1
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Figure 1. (A) Preoperative ultrasound showed multiple uterine leiomyomas. (B) Ultrasound image of normal uterus 6 months after surgery.

She underwent laparoscopic myomectomy. After entering the abdominal cavity, we found a 3*3 cm smooth, firm mass with a narrow base in the area of the isthmus of the left fallopian tube (Figures 2A–C). There are also several large uterine leiomyomas, as described by ultrasound. The base of the leiomyoma of fallopian tube was treated with bipolar coagulation to reduce bleeding, and the base was cut 0.5 cm away from the tube by scissors (Figures 2D,E). This combination of cold and heat ensured the integrity and function of the fallopian tube. The remaining uterine leiomyomas were treat according to conventional methods (Figure 2F). Three uterine leiomyomas and one leiomyoma of the fallopian tube were removed. The final pathology revealed leiomyoma. The patient recovered smoothly and was discharged soon. She received monthly GnRH-a injections for four months after surgery. Ultrasound at 6 months postoperatively showed no abnormality (Figure 1B). Hysterosalpingo-contrast-sonography (HyCoSy) at 15 months postoperatively showed bilateral fallopian tubes were unobstructed (Figure 3).

FIGURE 2
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Figure 2. (A–C) A 3*3 cm smooth, firm mass with a narrow base was seen in the area of the isthmus of the left fallopian tube. There are also several large uterine leiomyoma, as described by ultrasound. (D,E) After the base of leiomyoma of fallopian tube was treated with bipolar coagulation to reduce bleeding, the base was cut 0.5 cm away from the tube by scissors. (F) Treat the remaining uterine leiomyoma according to conventional methods.

FIGURE 3
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Figure 3. Hysterosalpingo-contrast-sonography (HyCoSy) at 15 months postoperatively showed bilateral fallopian tubes were unobstructed.

Discussion

Benign tumors originating from the fallopian tubes are very rare and can present in a variety of histologic types, including leiomyoma, teratoma, fibroma, Adenomatoid tumor, lipoma, hemangioma, papilloma, Solitary fibrous tumor, etc (69). Due to the very small number of cases, it is difficult to assess the incidence of leiomyoma of the fallopian tube. Cases have been reported in the age of onset from reproductive age to menopause, and mostly in 25–45 years old. The highest age reported in the past was 70 years old, reported by Ozkan et al. (10). Leiomyoma of the fallopian tube originates from the smooth muscle of the tube or the cells of the blood vessels supplying the fallopian tube (11). Embryologically, both the uterus and the fallopian tube originate from the Müllerian duct. Part of the reason for the difference in incidence between tubal and uterine leiomyoma may be that the myometrium of the fallopian tube is relatively unresponsive to estrogen compared to the uterine myometrium (2). Leiomyoma of the fallopian tube are mostly unilateral, small and asymptomatic, and most cases are discovered incidentally during diagnostic laparoscopy or other operations. Some patients may seek medical attention due to the huge size of tubal leiomyoma or abdominal pain caused by torsion or degenerative changes of leiomyoma, or due to the coexistence of tubal ectopic pregnancy and tubal leiomyoma (2, 9, 12). The pathogenesis of ectopic pregnancy may be that tubal leiomyoma compresses the lumen of the fallopian tube or tubal leiomyoma lead to alteration in the ciliary motion in the tube so that the fertilized egg implants in the tube. Ozkan et al. reported a case of massive intraperitoneal hemorrhage due to spontaneous rupture of leiomyoma of the fallopian tube (10). Imaging findings of tube leiomyoma were similar to those of uterine leiomyoma. Ultrasound shows a homogeneous hypoechoic solid mass with poor sound through transmission (13). CT showed a sausage-shaped mass separated from the ovary (14). Viable leiomyomas enhance homogeneously. Because the blood supply of the fallopian tube is not as rich as the uterine myometrium, when the growth of the tube leiomyoma exceeds its blood supply, degeneration such as myxoid degeneration often occurs. Degeneration is indicated when coarse calcification or heterogeneous enhancement is present. MR imaging is the best way to visualize and localize leiomyomas. The images show a fusiform adnexal mass between, but separate from, the uterus and ovary. On T1-weighted images, leiomyomas are isointense relative to the uterine myometrium and hypointense on T2-weighted images. With homogeneous enhancement in viable leiomyomas and heterogeneous enhancement in degenerating leiomyomas, and fallopian tube torsion appears as tubular lesions, tapered ends, beak sign (9, 14). Nevertheless, leiomyoma of the fallopian tube is still hard to diagnose preoperatively and is often misdiagnosed as subserous uterine leiomyoma with torsion, ovarian cyst, mesenteric tumor, small pelvic tumor, abdominal hemorrhage, etc. This is partly because primary tumors of the fallopian tube are uncommon, easily diagnosed as a mass in the ovary or uterus, and often require surgical exploration to confirm the diagnosis. When leiomyoma of the fallopian tube is present, the differential diagnosis of this disease should include parasitic leiomyoma and leiomyomatosis peritonealis disseminata (LPD) (15, 16). Patients with parasitic leiomyoma had a history of laparoscopic surgery with the use of morcellation. Parasitic myomas were found on the peritoneum of theabdominal or pelvic wall, in Douglas' pouch or on the omentum, colon and small intestines (16). If patients without a history of laparoscopic morcellation, the differential diagnosis of LPD should be considered. LPD is a disease that is characterised by the presence of many (sub-) peritoneal smooth-muscle nodules disseminated through the omentum and peritoneum (15). The pathogenesis of this disease is still unclear, but the nodules are thought to originate from sub-mesothelial multipotential cells located in the female pelvic peritoneum. In most cases, the leiomyoma is located in the isthmus, a few are located in the ampulla, and most are located in the left fallopian tube (1, 2, 5), as in this case. The surgical method and scope are based on the patient's age, lesion size, and fertility status. Salpingectomy or myomectomy can be selected. Patient with no fertility requirement should consider salpingectomy. When the patient is complicated with uterine disease, total hysterectomy and bilateral salpingectomy or bilateral adnexectomy can be considered. Most tubal leiomyoma can be removed by laparoscopy, unless patients have contraindications to laparoscopic surgery, such as severe pelvic adhesions. It should be suspected that the lesion is malignant if the intraoperative leiomyoma is fish-like, with unclear boundaries, brittle quality, and abundant blood supply. The surgical scope should be determined according to the frozen section diagnosis. Especially for patients with fertility requirements, the leiomyoma should be removed as much as possible on the premise of ensuring the integrity and function of the fallopian tube. Before the surgery, the use of vasopressin can decrease bleed loss during surgery. The use of chromopertubation can define the tube and avoid the lumen, allowing complete resection of the leiomyoma, and the avoidance of electrosurgery around the tubes. Cellular leiomyoma is a morphologic variant of tubal leiomyoma reported in the literature and characterized by a dense cellular infiltrate composed of spindle or round cells with scant cytoplasm, nuclei without atypia, low mitotic activity, and a less obvious interlacing fascicle pattern (5, 10). No adjuvant therapy is required after surgery, but long-term follow-up is required due to its malignant potential (17).

Data availability statement

The original contributions presented in the study are included in the article/Supplementary Material, further inquiries can be directed to the corresponding author/s.

Ethics statement

Written informed consent was obtained from the individual(s) for the publication of any potentially identifiable images or data included in this article.

Author contributions

All the authors listed have made substantial contributions to this work and have approved for publication. XF contributed to the case design. BC completed the manuscript. RW and YF performed the acquisition of data and photo editing. BC and RW contributed to improving the manuscript. All authors contributed to the article and approved the submitted version.

Funding

This work was supported by the Guangzhou Science and Technology Plan Project (202102010135).

Conflict of interest

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Publisher's note

All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.

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Keywords: fallopian tube neoplasms, fertility, leiomyoma, benign tumors, laparoscopic myomectomy

Citation: Cheng B, Wang R, Fu Y and Fu X (2023) Leiomyoma of the fallopian tube found during laparoscopic myomectomy: A case report and review of the literature. Front. Surg. 10:997338. doi: 10.3389/fsurg.2023.997338

Received: 18 July 2022; Accepted: 17 March 2023;
Published: 31 March 2023.

Edited by:

Stefano Cianci, University of Messina, Italy

Reviewed by:

Taobo Hu, Peking University People's Hospital, China
Iffat Ahmed, Aga Khan University, Pakistan

© 2023 Cheng, Wang, Fu and Fu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

*Correspondence: Xi Fu xjfx2004@sina.com

Specialty Section: This article was submitted to Obstetrics and Gynecological Surgery, a section of the journal Frontiers in Surgery

Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.