Abstract
Ovarian leiomyoma accounts only for 0.5–1% of all benign ovarian tumors, and almost no preoperative diagnosis has been achieved. Commonly, these tumors are small in size and asymptomatic. However, they can become symptomatic as their size increases; thus, it is important to recognize this entity and differentiate them from ovarian malignant tumors. Radical surgeries with total hysterectomy and salpingo-oophorectomy are usually performed. However, ovary-preserving surgery has been suggested to young women, especially those desiring fertility in the future. In this study, we shared seven cases of primary ovarian leiomyomas and one inherent ligament leiomyoma, reviewed related articles to provide some new information about leiomyoma of the ovary, and discussed their proper surgical management.
Introduction
Leiomyoma is one of the rarest ovarian benign tumors, accounting for 0.5–1% (1). Since the first case was identified in 1862 (2), fewer than 80 cases have been reported by case reports or case series. Most of them aged 17–79 years are asymptomatic and diagnosed incidentally during a routine pelvic examination, surgery, or even at autopsy (3). Symptoms include lower abdominal pain (4), ascites (5), pelvic mass, elevated cancer antigen 125 (CA125) level (6, 7), or Meigs' syndrome (8). Typically, ovarian leiomyoma is unilateral with no predilection for the right or left ovary, while bilateral cases have been reported mainly in women aged 16–25 and never in women aged more than 35 (4). Moreover, it is seldom diagnosed before operation due to low clinical incidence and difficulty in distinguishing it from a pelvic solid mass. Radical surgeries with adnexectomy or total hysterectomy and salpingo-oophorectomy are carried out, even in adolescent or young child-bearing women. In this study, we shared seven cases of primary ovarian leiomyoma and one inherent ligament leiomyoma to explore their proper surgical management. In addition, a review of related articles is presented.
This research was approved by the ethics committee of Women's Hospital Zhejiang University (No. 2019026), which confirmed that special approval was not required for this study. The authors agree to provide copies of the appropriate documentation upon request.
Case Presentation
We reported a case series of seven primary ovarian leiomyomas and one inherent ligament leiomyoma diagnosed in the Pathology Department of Women's Hospital, Zhejiang University School of Medicine from 2012 to 2018. Clinical data were collected mainly by a search of medical records and are summarized in Tables 1, 2. The preoperative pelvic MRI findings and the gross characteristics of ovarian leiomyoma obtained for case 8 are also shown in Figures 1, 2.
Table 1
| Case | Age | Complaints/ | Tumor | Tumor size |
|---|---|---|---|---|
| (years) | Duration | location | (diameter, cm) | |
| on USG | ||||
| 1 | 24 | Pelvic mass/2 months | Right | 6 |
| 2 | 65 | Pelvic mass/20 years | Left | 6 |
| 3 | 34 | Pelvic mass/1 months | Left inherent ligament | 3 |
| 4 | 57 | Pelvic mass/1 months | Right | 20 |
| 5 | 17 | Vaginal bleeding/3 months | Left | 8 |
| 6 | 29 | Pelvic mass/1 months | Left | 2 |
| 7 | 31 | Primary infertility/4 years | Right | 6 |
| 8 | 51 | Pelvic mass/10 years | Right | 8 |
Demographic characteristics of our eight patients.
Table 2
| Histologic features | |||||
|---|---|---|---|---|---|
| Case | Preoperative diagnosis | Surgery method | Frozen section | Metotic index | Degeneration |
| 1 | Sex cord-stromal tumor | Myomectomy | Leiomyoma | 0 | Hyaline, calcification |
| 2 | Subserous myomas | SOH | Leiomyoma | 0 | Hyaline, calcification |
| 3 | Ovarian tumor? myomas? | Myomectomy | Leiomyoma | 0 | None |
| 4 | Subserous myomas | SOH | Mesenchymal origin | 0 | Edema, hyaline |
| 5 | Sex cord-stromal tumors | Myomectomy | Mesenchymal origin | 4/10HPF | None |
| 6 | Sex cord-stromal tumors | Myomectomy | Leiomyoma considered | 0 | None |
| 7 | Ovarian tumor? myomas? | Myomectomy | Fibroma or leiomyoma | 0 | None |
| 8 | Subserous myomas | Myomectomy | Leiomyoma | 0 | None |
Surgical and histopathological results of our eight cases.
SOH, salpingo-oophorectomy with hysterectomy; 10 HPF, number of mitotic figures per 400 high-power fields divided by 10.
Figure 1
Preoperative pelvic MRI findings obtained for case 8. (A) On axial diffusion-weighted image (repetition time (TR)/echo time (TE): 4,000/72.4 ms, b-value = 500 s/mm2); the two masses showed the same intermediate signal intensity. (B) On sagittal T1-weighted with gadolinium administration (TR/TE: 3.9/1.7 ms), the left mass showed low signal intensity identical to the uterus myometrium. (C) On axial fat-saturated T2-weighted (TR/TE: 3,020/70.5 ms) image, the signal intensity of the left mass was continuous with the myometrium, while the right mass was well-circumscribed and sharply demarcated from the uterus. (D) On axial T1-weighted with gadolinium administration (TR/TE: 3.9/1.7 ms), flow voids were visible only between the tumor and the uterus myometrium on the left mass.
Figure 2
The gross characteristics of ovarian leiomyoma obtained for case 8. (A) Two solid, irregular, vascular-appearing mass was shown; the left growing from the uterine, while the other from the right ovary; the uterus was normal. (B) The thickened ovarian inherent ligament and enlarged right ovary with a sharply demarcated border, no adhesion, and no infiltration of the surrounding structures.
The mean age was 38.5 years (range 17–65 years). Six patients (75%) complained of an asymptomatic pelvic mass with the longest duration for 20 years, one had a history of primary infertility for 4 years and another presented with a 3-month history of irregular vaginal bleeding. The majority (62.5%) were located in the unilateral ovary, except one in the ovary inherent ligament. The mean diameter by ultrasound was 7 cm, and the CA125 level was normal in all cases.
None of them was successfully diagnosed before the operation. Three (37.5%) were misdiagnosed as ovarian sex cord-stromal tumors and three (37.5%) as uterine subserous myoma, while the other two (25%) as ovary malignant tumors. The two oldest cases had a total hysterectomy and bilateral salpingo-oophorectomy, and a myomectomy was performed in the rest of the patients. Except for the 17-year-old girl who had 100 ml of ascites and nuclear division (4/10 high-powered fields [HPFs]), as shown in Figure 3, no other malignant cases, including cellular atypia, pleomorphism, and necrosis, were found. The surgical and histopathological results are shown in Table 2. All patients were followed up via telephone before the article was written, and none of them had tumor recurrence or surgery complications.
Figure 3
The histological images of case 5. Histological test results demonstrated ovarian leiomyoma with smooth muscle actin (SMA) positive and mitosis in 4/10 high-powered fields (H&E, original magnification 400 ×).
Results of Literature Review
A PubMed search for case reports and series was also conducted with “ovarian leiomyoma” or “smooth-muscle tumors of the ovary” used as keywords. The literature inclusion criteria were human subjects, written in English, and full-text availability, while editorial and conference highlights were excluded. The patients' data were extracted, and the clinical data were described or summarized. Only cases with detailed demographic characteristics and surgical procedures were analyzed, excluding tumors without proven pathological diagnoses. The whole screening process was independently completed by Guanmian Lang and Li Zhu, while Zaigui Wu and Fei Ruan was consulted for any disagreements. A total of 61 full-text articles with 70 cases were included for analysis (Figure 4).
Figure 4
Chart of the literature electronic search of ovarian leiomyoma.
Clinical Features of Ovarian Leiomyoma
As summarized in Tables 3, 21 cases were asymptomatic, except pelvic mass, and their mean age was 41.43 years with a range of 17–84 years. They were incidentally found using ultrasound or during abdominal surgeries. A total of 49 patients presented mainly with abdominal pain, of whom the youngest was 13 years and the oldest was 103 years with a mean age of 45.56 years. Apart from the main complaint, other rare presentations including vaginal discharge, virilization, and menstrual abnormality have also been reported. None of the 70 cases were diagnosed correctly before surgery, and the most common misdiagnosis was uterine myoma. The second most common misdiagnosis was malignant tumors and fibroma/thecoma, with only a small number of cystadenoma and teratoma misdiagnosed.
Table 3
| Cases | Age (y) | Initial diagnosis | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| <35 | 35–45 | ≧45 | UL | Fibroma/ | Cystadenoma/ | OM | ST | MT | UD | |
| thecoma | teratoma | |||||||||
| Asyma | 8 | 5 | 8 | 7 | 4 | 1 | 6 | 0 | 0 | 3 |
| Symb | 15 | 6 | 27 | 11 | 4 | 4 | 13 | 4 | 10 | 3 |
Age distribution and preoperative diagnosis of ovarian leiomyoma.
U, uterine leiomyoma; OM, ovarian mass; ST, solid tumor; MT, malignant tumor; UD, cases without diagnosis. a is the number of asymptomatic patients and b is the number of symptomatic individuals.
Laboratory Findings of Ovarian Leiomyoma
Ovarian leiomyoma with increased CA125 levels was rare, and information about each case report is summarized in Table 4. It was more common in postmenopausal women with a predilection for the left ovary. An elevated CA125 level with the adnexal mass was suggestive of ovarian malignancy, and thus total hysterectomy with salpingo-oophorectomy was usually performed. One of the reported cases had a level even up to 4, 877 U/ml, and a more invasive surgery was carried out.
Table 4
| Author | Age (y) | Clinical presentations | CA125 (U/ml) | Preoperative diagnoses | Surgery method | Site | Size (cm) | Histologic features | Post-operative course |
|---|---|---|---|---|---|---|---|---|---|
| Ichigo et al. (9) | 76 | Abdominal discomfort | 49.9 | Broad ligament leiomyoma | TAH + BSO | R | 19*11*10 | Mitotic 2-3/10HPF, Cystic, hyaline, myxomatous | Uneventful |
| Sasikala et al. (7) | 53 | Abdominal pain, distension | 50 | Ovarian fibroma | TAH + BSO + omental biopsy | L | 16*12 | Sclerosis | Uneventful |
| Kurai et al. (8) | 76 | Chest pain, dyspnea, pleural effusion | 163 | Ovarian tumor | TAH + BSO | L | 9*7*7 | Mitotic 1–2/10 HPF, Meigs'syndrome | Pleural effusion disappeared, CA-125 normal |
| Erdemoglu et al. (10) | 45 | 70.6 | Fibroma /thecoma | TAH + BSO | L | 8*9 | None | ||
| Yumru et al. (6) | 55 | Epileptic seizure, abdominal pain | 4, 877 | Ovarian tumor | TAH + BSO + lymphadenectomy + appendectomy+ infracolic omenectomy + multiple biopsies | L | 30*28*15 | Unknown | No more epileptic seizures |
Characteristics of ovarian leiomyoma with an elevated CA125 level.
TAH, total abdominal hysterectomy; BSO, bilateral salpingo-ophorectomy; R, the right ovary; L, the left ovary.
Ovarian leiomyoma associated with abnormal hormonal production was extremely rare, and the data are summarized in Table 5. Three of the cases were detected due to androgen overproduction such as male-type baldness or excessive hair growth. These leiomyomas can induce theca cell's luteinization. The elevated testosterone decreased dramatically, and manifestations of overt androgen improved markedly after tumorectomy. Amenorrhoea and abnormal uterine bleeding were also observed in reproductive or postmenopausal women with ovary leiomyoma, which might be due to inhibin B and luteinizing hormone produced by the tumor.
Table 5
| Author | Age (y) | Clinical symptoms | Abnormal Tests | Preoperative diagnoses | Surgery method | Tumor site | Size (cm) | Histologic features | Post-operative course |
|---|---|---|---|---|---|---|---|---|---|
| Parish et al. (11) | 68 | Virilization | T 1082 ng/dl, free T 25.8 ng/dl | Ovarian mass | TAH + BSO | Right | 10*10*4.5 | Hilus cells proliferation | T 45ng/dl on first postoperative day. died 1 month letter for cerebral infarction. |
| Mallya et al. (12) | 56 | Excessive hair growth | T 49 nmol/l | Ovarian mass | TAH + BO | Left | 11*11*7 | Theca cell reaction, edema, fatty tissue | T normal; markedly improved scalp hair growth; facial and truncal hair reduced considerably; clitoromegaly regressed postoperation 3 months |
| Carpén et al. (13) | 64 | Hair loss, male type baldness | T 20.4 nmol/l | Ovarian mass | BO | Right | 7*5*5 | Luteinized theca cells | T decreased dramatically; hair growth not weaken |
| Abdel-Gadir et al. (14) | 35 | Amenorrhoea, infertility | Inhibin B 408 pg/ml, LH 19.5 IU/l | Broad ligament leiomyoma/ ovarian fibroma | Mass excision | Right | 7.4*4.1*6.1 | Parasitic leiomyoma | menstruation recovered, uterine enlarged, natural conception;successful pregnancy by IVF |
Characteristics of ovarian leiomyoma with abnormal hormonal synthesis.
T, testosterone; BO, bilateral oophorectomy; IVF, in vitro fertilization.
Surgery Method of Ovarian Leiomyoma
Surgical procedures for cases of ovarian leiomyoma are shown in Table 6. In cases where patients aged less than 35, 10 had unilateral oophorectomy or salpingo-oophorectomy and 11 had mass excision, while one aged 17 had bilateral salpingo-oophorectomy (3) and another aged 29 had total hysterectomy and bilateral salpingo-oophorectomy (15). In women aged between 35 and 45 years, unilateral oophorectomy/salpingo-oophorectomy was performed in five patients, bilateral salpingo-oophorectomy in one patient, and total hysterectomy and unilateral salpingo-oophorectomy in two patients, while mass excision was performed in three patients. In individuals more than 45 years, 21 had total hysterectomy and bilateral/unilateral salpingo-oophorectomy, 5 had bilateral oophorectomy/salpingo-oophorectomy, 9 had unilateral oophorectomy/salpingo-oophorectomy, whereas only one had mass excision.
Table 6
| Surgery | Age<35y | 35y>Age<45y | Age≧45y | |||
|---|---|---|---|---|---|---|
| Asymptomatic | Symptomatic | Asymptomatic | Symptomatic | Asymptomatic | Symptomatic | |
| UO/USO | 3 | 7 | 2 | 3 | 2 | 6+1 |
| Mass excision | 4 | 7 | 1 | 2 | 0 | 1 |
| TH+BSO/USO | 0 | 1 | 2 | 0 | 4 | 17 |
| BO/BSO | 1 | 0 | 0 | 1 | 2 | 3 |
Surgical procedures for cases of ovarian leiomyoma.
UO, unilateral oophorectomy; USO, unilateral salpingo-oophorectomy; TH, total hysterectomy.
+1Left SO and right myomectomy were performed in a 25-year-old case with bilateral ovarian leiomyoma.
Tumor Site, Size, and Histological Features of Ovarian Leiomyoma
In Table 7, a predilection for the right ovary, especially in symptomatic cases, is noted. In a total of 63 unilateral cases, 27 leiomyomas were located in the left ovary and 35 in the right ovary. Of the six bilateral cases, six were aged below 35 years, one aged 45 years, and the other aged 46 years. Mass with a diameter of more than 10 cm was observed in nearly half, both in asymptomatic and symptomatic individuals. Seven asymptomatic and 18 symptomatic patients had a tumor diameter between 5 and 10 cm. Hyalinization and edema were the most common types of degeneration, while myxoid degeneration was much more common in symptomatic cases. Symptomatic cases also had mitotically active, atypical cells.
Table 7
| Case | Site | Size (cm) | Risk | Degeneration | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L | R | Bi | ≧10 | 5–10 | <5 | MI | Atypia | Necrosis | Hyaline | Cystic | Myxoid | Edema | Hem | Cal | |
| Asya | 9 | 10 | 2 | 10 | 7 | 4 | 0 | 0 | 1 | 7 | 2 | 1 | 3 | 1 | 2 |
| Symb | 20 | 25 | 4 | 22 | 18 | 7 | 7 | 3 | 1 | 9 | 5 | 7 | 4 | 5 | 0 |
Tumor site, size, and histopathological results of patients diagnosed with ovarian leiomyomas.
Bi, bilateral ovary; MI, mitotic index; Hem, hemorrhage; Cal, calcification; a, Asymptomatic cases; b, Symptomatic cases.
Follow-Up After Operation
Follow-up information was available for 22 cases in 13 case reports (Table 8) and one case series (29). During the follow-up period (range 1–48 months), only one case had tumor recurrence (19). She was a 24-year-old nulliparous woman who first had left oophorectomy and omentectomy with right ovary biopsies for a left ovarian cyst sized 9 cm ×8 cm × 11 cm and some small nodules (<1 cm) on the right ovary. Nuclear pleomorphism with high mitotic activity in one area was indicated, but this was insufficient to diagnose a sarcoma by an external histological center. Increasing abdominal pain and girth occurred at 7 months and a multiple cystic ovarian mass measured 5 cm × 3 cm was found in the right ovary. The second pathological examination showed extensive cystic destruction with some solid leiomyoma areas, but no ovarian tissue remaining.
Table 8
| Author | Age(y) | Complaints | Preoperative diagnoses | Surgery Method | Site | size(cm) | Histologic Features | Follow-up |
|---|---|---|---|---|---|---|---|---|
| Sapala et al. (16) | 103 | Abdominal pain | Malignant tumor | Mass excision | L | 30*30*19.5 | cellularity | 2 years, no recurrence |
| Zhao et al. (17) | 28 | Abdominal pain | Adnexal tumor | Mass excision | R | 10.4*10*6.6 | Ischemic infarction | 3 years, no recurrence |
| Shrestha et al. (18) | 25 | Abdominal pain | Malignant tumor | Left USO + right myomectomy | Bi | 18*5(left), 5*3(right) | Edema | 9 months, no recurrence |
| Emovon et al. (19) | 24 | Abdominal pain, nausea, vomiting | Malignant tumor | LO + omentectomy | L | 9*8*11 | Pleomorphism with focal high mitotic activity | 7 months, recurrence |
| Alshwairikh et al. (20) | 45 | Abdominal pain, distension | Peritoneal malignancy | LO + omentectomy | L | 39*30.2 | Cystic degeneration | 6 months, no recurrence |
| Kitamura et al. (21) | 50 | Excessive menstruation | Ovarian tumor | TLH + USO | R | 5.5*3*3 | Wide fibrosis, hyalinization | 6 months, no recurrence |
| Kim et al. (22) | 35 | Acute abdomen, pregnancy 10gw | Torsion of pedunculated myoma | USO | R | 9.3*7.8, twisted | None | Delivered at 40 + 1 gw, no recurrence |
| Tomas et al. (23) | 31 | Abdominal pain, fever, vomiting | Acute appendicitis | USO + appendectomy | L | 11*10*6 | Endometriotic cyst, periappendicitis | 6 months, no recurrence |
| Wang et al. (24) | 58 | Abdominal distention | Ovarian solid tumor | USO | R | 20*18 | Atypical leiomyoma | 9 months, no recurrence |
| Daniel et al. (25) | 31 | Term CS | Unknown | Mass excision | Bi | multiple small tumors | Calcification | 2 months, no recurrence |
| Sato et al. (26) | 61 | Mass screening | Ovarian tumor | TAH + BSO | R | 16.0*10.0*5.0 | Cystic degeneration | 2 years, no recurrence |
| Kohno et al. (27) | 30 | Threatened abortion at 16gw | Uterine leiomyoma | Mass excision | L | 23*23*20 | Hyalinization, edema | Delivery at 40gw, no recurrence |
| Raje et al. (28) | 31 | Incidental finding | Ovarian fibroid | Mass excision | R | 5*4*4 | None | 1 year, no recurrence |
Characteristics of ovarian leiomyoma with detailed follow-up information.
CS, cesarean section; LO, left oophorectomy; TLH, total laparoscopic hysterectomy.
Discussion
In this article, we reported eight cases of leiomyoma from the ovary or ovarian inherent ligament. In the literature review, we found that leiomyoma of the ovary has a predilection for the right ovary, can attain massive sizes and cause pressure symptoms, and can be bilateral in women over 35 years, which seems to be in contradiction with previous reports. In addition, ovarian leiomyoma demonstrates an extremely low risk of malignant degeneration, and efforts should be made to preserve fertility and improve the life quality by avoiding destructive ovarian surgery.
Ovarian leiomyoma can occur in women of all ages, but nearly 80% is found in patients aged 20–65 years (30). So far, only five cases (7.1%) aged <20 years have been reported, and in our study, only one (12.5%) is below this age. It has been revealed to rarely exceed 3 cm in diameter (31). However, most reported cases have a diameter of more than 5 cm, and some even have a mass extending higher than umbilicus, as summarized in this review. An obvious predilection for the right ovary has been observed too. Thus, ovarian leiomyoma may not be small in size and is often unilateral but with a right ovary predilection.
More than two-thirds of the reviewed cases are symptomatic. Clinical manifestations include pelvic pain, abnormal uterine bleeding, menorrhagia, and frequent urination, which are similar to uterine fibroid and associated with tumor size (32, 33). Their relationship with infertility has been reported (29), and one of our cases indeed had 4 years of infertility. Virilization arises from elevated testosterone levels second to theca cell proliferation (11–13), while appendicitis-like symptoms might result from periappendicitis (23, 34). Meigs' syndrome is very rare, and only two cases have been reported in 2005 (8) and 2006 (10). The etiology of these rare presentations is not known and might be associated with tumor origin.
Symptoms of ovarian leiomyoma are diverse and nonspecific, whereas the presence of imaging features and laboratory findings are nonspecific as well. Preoperative evaluations by ultrasound, CT, or MRI have difficulty in demonstrating its origin or distinguishing them from other pelvic solid tumors. Their cystic, hemorrhagic, and calcified degeneration on radiography may even suggest malignant risk, especially in combination with high CA125 levels or ascites, resulting in a more invasive surgery (6). Frozen section examination is helpful in determining the extent of surgery, and its accuracy for leiomyoma of the ovary in our investigation ranges from 50 to 62.5%.
Ovarian leiomyoma can be diagnosed by a combination of histopathological evaluation and immunohistochemical markers; however, caution should be taken when distinguishing with fibroma using smooth muscle actin (SMA) (35). Significant nuclear atypia, pleomorphism, and necrosis have been traditionally utilized to evaluate ovarian malignant leiomyoma; however, mitotic activity, necrosis, and atypical cells need to be evaluated carefully as these tumors can also have a benign course (36). A high mitotic activity in the presence of nuclear pleomorphism is an indication of potential malignancy, and these patients tend to be recurrent.
As summarized in this review, total hysterectomy and bilateral salpingo-oophorectomy are performed usually in middle-aged and older patients, and this surgical procedure has been performed in only one patient aged 29 (15). Unilateral salpingo-oophorectomy or oophorectomy is a better choice for all ages of patients with unilateral leiomyoma, while bilateral oophorectomy has often been required for those with bilateral leiomyoma as reported earlier (3). However, mass excision or ovarian sparing procedures have been gradually reported especially in younger cases, and no recurrence has been reported so far. Thus, an ovary-preserving surgery has been suggested for women who desire fertility, unless potential malignancy is observed in the tumor. Ovarian leiomyoma has a pseudocapsule similar to those from the uterus, and intracapsular myomectomies can be performed easily. To date, no studies have assessed the margin status and the only one recurrent patient first had right ovarian biopsies for some small nodules <1 cm, whereas the second histological examination showed extensive cystic destruction and some solid leiomyoma areas with no ovarian tissue remaining.
In conclusion, primary ovarian leiomyoma is mostly benign in nature with an excellent prognosis. The follow-up of patients with a smaller tumor size is an option, but radical surgical treatment has been suggested for those with a mass diameter exceeding 3–4 cm to avoid ovarian destruction by the tumors. Mass excision is preferred in women of reproductive desire, whereas total hysterectomy and bilateral salpingo-oophorectomy can be considered in middle-aged and older adult patients.
Funding
This research was supported by the Natural Science Foundation of Zhejiang Province (No. LQ19H040011 and LGF22H040002), the Zhejiang Province Medical and Health Technology Project (No. 2019KY431), and the Program for Higher Education Research Association of Zhejiang University (No. G2127).
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Statements
Author contributions
ZW collected the clinical data, drafted, and revised the manuscript. GL and LZ screened and summarized the review literature. GL helped to draft the manuscript and revised the manuscript. FR drafted and revised the manuscript. All authors read and approved the final manuscript.
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.
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Summary
Keywords
leiomyoma, ovary, solid tumor, case series, surgical management
Citation
Liang G, Wu Z, Zhu L and Ruan F (2022) Case Report: Primary Ovarian Leiomyoma: A Clinical Analysis of Case Series and Literature Review. Front. Med. 9:822339. doi: 10.3389/fmed.2022.822339
Received
25 November 2021
Accepted
17 February 2022
Published
01 April 2022
Volume
9 - 2022
Edited by
Kruti P. Maniar, NorthShore University HealthSystem, United States
Reviewed by
Amanda Strickland, Northwestern Medicine, United States; Andrea Tinelli, Moscow Institute of Physics and Technology, Russia
Updates
Copyright
© 2022 Liang, Wu, Zhu and Ruan.
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: Fei Ruan 5202014@zju.edu.cnZaigui Wu 411773@zju.edu.cn
This article was submitted to Obstetrics and Gynecology, a section of the journal Frontiers in Medicine
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