Abstract
Background. Pregnancy luteomas are rare, benign, ovarian neoplasms resulting from increased androgenic activity during pregnancy. Often, they occur asymptomatically and are only diagnosed incidentally during imaging or surgery: cesarean section or postpartum tubal ligation. Most common symptoms associated with pregnancy luteoma include acne, deepening of voice, hirsutism, and clitoromegaly. Most pregnancy luteomas regress spontaneously postpartum. Thus, the management of pregnancy luteomas depends on the clinical situation. Case. We report a case of 28-year-old gravida 2, para 1 who presented at weeks of gestation with prolonged labor and delivered by emergency cesarean. Intraoperatively, a huge left ovarian mass was identified and resected, and tissue was sent for histopathology and a diagnosis of pregnancy luteoma was made after the pathological report. Conclusion. The present report emphasizes that pregnancy luteoma is a benign neoplasm and imprudent surgical intervention should be reserved. Proper imaging techniques, preferably MRI or ultrasonography that visualize the size of the ovary and reproductive hormonal profiles, would suffice for the diagnosis and management of pregnancy luteoma.
1. Introduction
Pregnancy luteoma is a rare nonneoplastic tumor-like lesion of the ovary that has an increased androgenic activity during pregnancy [1]. It is associated with varied symptoms, for instance, hirsutism, acne, deepening of voice, and virilization symptoms [2]. The first occurrence was reported by Sternberg and Barclay in 1966, and to date, very few cases have been documented in the literature [3]. It is almost always incidentally identified during operation, either at the time of cesarean section or during postpartum tubal ligation [3]. Many cases have been documented to resolve postpartum, but some have been associated with recurrence in the subsequent pregnancy [4]. Accurate case diagnosis is pertinent to avoid unnecessary oophorectomy, which may result in grave effects in the subsequent years. We present a woman incidentally found to have a large solid ovarian mass that presented a diagnostic dilemma intraoperatively and confirmed only after a pathological report.
2. Case Report
A 28-year-old pregnant woman with , gravida 2, para 1, at 39 weeks and 1 day of gestation, was admitted to the antenatal ward presenting with lower abdominal pain and mucoid bloody stained discharge. Her current antenatal, medical, and gynecological history was unremarkable; menarche was during her 10th year; and her menses were painless and of regular length, amount, and flow. During the index pregnancy, nothing remarkable was noted during her antenatal visits. She did two obstetric ultrasounds at 31 and 37 weeks, and both showed a viable fetus with no adnexal masses.
Past obstetric history is remarkable for preeclampsia from the 24th week of pregnancy and vaginal delivery of a premature male stillbirth of 1.5 kg about 2 years ago. She acknowledged having facial hirsutism that started from the 20th week of pregnancy and persisted postpartum but was not associated with deepening of the voice or other virilization symptoms.
On general examination, she had normal findings, with normal female hair distribution except for facial hair at the chin, and no other signs of virilization were noted. She reported that acne was present earlier in pregnancy but subsided as the pregnancy progressed.
2.1. Labor and Delivery
Her antenatal work-up revealed she was in the latent phase of labor and was kept for observation. Following an active onset of labor, she was transferred to the labor ward, but her labor progressed poorly and was prepared for emergency cesarean. Intraoperatively, a healthy female infant (with no virilization features) weighing 3.5 kg with Apgar scores of 9 and 10 at the first and fifth minutes, respectively, was extracted, and the uterus was then repaired accordingly. During the repair, a huge mass on the left adnexa measuring about involving the left ovary was noted (Figures 1(a)–1(d)), and unilateral oophorectomy was performed. The whole ovarian tissue (Figures 2(a) and 2(b)) was then sent for permanent section histopathological assessment suspecting ovarian malignancy. The uterus and right ovary both appeared macroscopically normal.
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The gross pathological examination revealed a large ovarian tissue with two grossly visible yellowish tumor-like marked granular cysts measuring 1.5 cm by 1 cm and 1 cm by 1 cm. On histology, there were granular luteinized cells in both cell masses but were otherwise normal ovarian tissues with hemorrhages and two follicular cysts with 2-3 mitoses/10 HPF (Figures 3(a) and 3(b)). Finally, it was diagnosed as pregnancy luteoma, with no obvious malignancy.
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2.2. Literature Review
We reviewed various pregnancy luteoma case reports published in English between 2000 and 2020. Our review included studies obtained from reference to published articles and literature search engines: PubMed or Google Scholar, using the terms “pregnancy luteoma.” A total of 205 case reports were reviewed from PubMed and 2,100 from Google Scholar. We identified and summarized 24 articles reporting 25 cases of pregnancy luteoma [2, 4–25] (Table 1).
3. Discussion
Pregnancy luteoma is a rare benign tumor-like enlargement of the ovary accompanying pregnancy [4]. An occurrence preponderance has been noted among the Afro-Caribbean around the ages of 30 and 40 years old and those with preexisting PCOS [11]. PCOS contributes to high β-hCG hormone levels favoring the proliferation of pregnancy luteoma [2, 26]. These findings on age of occurrence are consistent with our case report. The present literature review adds evidence to this finding on age of occurrence (Table 1). In addition, we found the occurrence not to be specific to the Afro-Caribbean but rather multiracial (Table 1). The exact age of incidence is unknown since most patients are asymptomatic and often incidentally diagnosed intraoperatively during cesarean or postoperative tubal ligation [4]. Furthermore, pregnancy luteoma masses have been reported to cause dystocia [7, 27], a finding that could have occurred in our case since C-section was done due to poor progress of labor. The etiology of pregnancy luteoma, although unclear, is proposed to arise from the proliferation of theca-lutein cells following hormonal stimulation [3].
Patients with pregnancy luteoma have been reported to present with features of androgen excess, for instance, acne, deepening of the voice, facial and/or abdominal hirsutism, and clitoromegaly [4]. These symptoms have been reported to begin sometime during pregnancy and subside or stop during the postpartum period (Table 1). Unfortunately, in other patients, not all of the symptoms subside: hirsutism, deepening of the voice, and clitoromegaly seem to persist while acne and hair loss subside [4]. In the present case report, the time for follow-up was short to ascertain whether there was subsiding of the mentioned symptom of hirsutism. This is a limitation in our case report. Several authors have shown virilization symptoms in the female fetus [11], a finding that was absent in our case report. It is hypothesized that despite the maternal hyperandrogenemia produced by the pregnancy luteoma between the critical 9-14 weeks of development, the placenta is somewhat protective against the masculinization of the female fetus by converting the excess androgens to estrogens [5]. Emerging evidence has implicated androgenemia, specifically elevated testosterone, as a causative for preeclampsia [28]. Furthermore, preeclamptic women have been reported to have high placental expressions of the androgen receptor (AR) gene and elevated levels of testosterone two- to threefolds compared non-preeclamptic women [28]. A finding that was consistent with our case report, she had hirsutism and preeclampsia. The only limitation in our case report was we failed to analyze the level of testosterone.
The diagnosis of pregnancy luteoma requires a high index of suspicion; once you suspect it based on the above-mentioned signs, perform detailed obstetric ultrasonography to visualize the size of the ovary. In addition, supportive investigations like hormonal assays should also be done to rule out other ovarian neoplasms [29].The management of pregnancy luteoma is case dependent (Table 1), for instance, cases presenting with severe virilization symptoms [2], pressure symptoms, or torsion will require prompt surgery while the asymptomatic cases require conservative managements with regular follow-up [30] as they usually regress spontaneously following delivery. Despite lacking hormonal assays in this case, spontaneous regression of hyperandrogenemia is the natural course of pregnancy luteoma [5]. Based on the presently described case, surgery for pregnancy luteoma was not indicated since there were no distressed symptoms. Instead, proper imaging techniques, preferably ultrasound or MRI and exploration of hormonal profile would suffice for diagnosis and management.
4. Conclusions
Based on the presently described case, pregnancy luteoma is a benign neoplasm and imprudent surgical intervention should be reserved. A high index of suspicion is paramount to diagnose pregnancy luteoma, and once suspected, one should perform a detailed obstetric ultrasound visualizing the size of the ovary and hormonal assay for testosterone and its derivatives.
Conflicts of Interest
The authors have no conflicts of interest to declare.
Acknowledgments
The authors are sincerely grateful to the patient for allowing us to share this informative report. We are also grateful for the excellent technical assistance from Dr. Nimish Chayya, Consultant Pathologist at TMJ Hospital, and the Departments of O & G at Lugalo Military Hospital and Muhimbili University of Health and Allied Sciences. We are forever indebted for the continued support and encouragement from the O & G postgraduate class of 2018.