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Ovarian Gynandroblastoma with a Juvenile Granulosa Cell Tumor Component in a Postmenopausal Woman: A Case Report and Literature Review
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Case Study
Ovarian Gynandroblastoma with a Juvenile Granulosa Cell Tumor Component in a Postmenopausal Woman: A Case Report and Literature Review
Nu Ri Jangorcid, Dae Hyung Lee1orcid, Eun Jung Jang2, Young Kyung Baeorcid, Jina Baekorcid, Min Hye Jang,orcid
Journal of Pathology and Translational Medicine 2018;52(5):344-348.
DOI: https://doi.org/10.4132/jptm.2018.06.28
Published online: July 17, 2018

Department of Pathology, Yeungnam University School of Medicine, Daegu, Korea

1Department of Gynecology and Obstetrics, Yeungnam University School of Medicine, Daegu, Korea

2Department of Pathology, Fatima Hospital, Daegu, Korea

Corresponding Author Min Hye Jang, MD, PhD Department of Pathology, Yeungnam University School of Medicine, 170 Hyeonchung-ro, Nam-gu, Daegu 42415, Korea Tel: +82-53-640-6753 Fax: +82-53-622-8432 E-mail: 'clodious@naver.com'
• Received: May 15, 2018   • Revised: June 25, 2018   • Accepted: June 28, 2018

© 2018 The Korean Society of Pathologists/The Korean Society for Cytopathology

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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  • Gynandroblastoma is an extremely rare sex cord-stromal tumor with both female (granulosa cell tumor) and male (Sertoli-Leydig cell tumor) elements. Juvenile granulosa cell tumors are also very rare and are so named because they usually occur in children and adolescents. A 71-year-old woman with right upper quadrant abdominal pain visited our hospital. Pelvic computed tomography showed a large multilocular cystic mass, suspected to be of ovarian origin. We performed a total abdominal hysterectomy (total abdominal hysterectomy was performed) with bilateral salpingo-oophorectomy. A 13-cm multilocular cystic mass with serous fluid was observed in her right ovary. Upon microscopic examination, the solid component of the mass showed both Sertoli-Leydig cell and juvenile granulosa cell differentiation, which we diagnosed as gynandroblastoma. Gynandroblastoma with a juvenile granulosa cell tumor component is extremely rare and, until now, only six cases have been reported in the English literature. We report the first gynandroblastoma with a juvenile granulosa cell tumor component diagnosed in an elderly patient, along with a literature review.
Gynandroblastoma is a rare ovarian tumor that manifests with a combination of two histological elements: granulosa cell tumor (GCT) and Sertoli-Leydig cell tumor (SLT) differentiation. Robert Meyer was the first to describe this type of tumor in 1930 [1]. Since then, only 28 cases have been reported in the English literature [2,3]. Gynandroblastoma usually consists of adult-type granulosa cells. Cases of juvenile GCT (JGCT) are rarer and have only been reported in women of reproductive age. Herein, we report the first case of ovarian gynandroblastoma with JGCT in an elderly patient. This study was approved by the Institutional Review Board of Yeungnam University Hospital with a waiver of informed consent (IRB No. YUMC 2018-04-019).
A 71-year-old woman (gravida 6, para 4) with acute abdominal pain in the right lower quadrant visited our hospital’s emergency room. Computed tomography revealed a large multiloculated cystic mass in the pelvic cavity (Fig. 1A). Subsequent ultrasonography revealed a cystic mass of approximately 13 cm in the right ovary (Fig. 1B). The patient had no family history of genetic syndromes and no other underlying diseases. She experienced menarche at age 16 and menopause at age 53. She had no history of symptoms associated with endocrine manifestations, i.e., neither estrogenic nor androgenic changes, such as endometrial hyperplasia, abnormal endometrial bleeding, oligomenorrhea, infertility, or virilization.
Her preoperative serum carbohydrate antigen (CA) 19-9 (19.48 U/mL) and CA125 (7.45 U/mL) levels were within normal ranges. Taking into consideration the preoperative diagnosis of torsion of the right ovarian tumor, the patient underwent total abdominal hysterectomy and bilateral salpingo-oophorectomy.
On gross examination of the right ovary, a 13.0 × 7.5 × 6.5-cm multilocular ovarian cyst with a smooth and glistening surface was observed (Fig. 2A). The cyst was filled with serosanguinous fluid, and the inner surface had a mainly smooth appearance. In the cystic lumen, a 3.7 × 1.8-cm solid yellowish mass was observed (Fig. 2B). There were no remarkable findings upon gross examination of the uterus, fallopian tubes, and left ovary.
Microscopically, the ovarian tumor consisted of a JGCT (40%) and a well-differentiated SLT (60%) (Fig. 3A). The JGCT displayed nodular growth patterns with follicles of various shapes and sizes. The follicles contained basophilic secretions resembling mucin (Fig. 3B). Cytologically, the tumor cells of the JGCT were round and had indistinct cell borders with abundant eosinophilic cytoplasm. The tumor cells’ nuclei were round-to-oval with open chromatin, but nuclear grooves were less prominent than usually observed in adult-type GCT. There was no striking nuclear atypia, and Call-Exner bodies were not identified. The SLT showed well-formed tubules of Sertoli cells and fibrous bandlike stroma with conspicuous Leydig cells (Fig. 3C). The Sertoli cells were cuboid-to-columnar with round nuclei and inconspicuous nucleoli. Nuclear atypia was absent. Leydig cells presented with abundant eosinophilic cytoplasm. Some tumor cells had foamy and vacuolated cytoplasm, but Reinke crystals were not prominent (inset of Fig. 3C).
Immunohistochemically, the tumor cells of both tumor components were positive for calretinin and inhibin, and negative for epithelial membrane antigen (Fig. 3DF).
The patient had no post-surgical complications, and there was no evidence of recurrence or metastasis during two years of follow-up.
Gynandroblastoma is a subtype of ovarian sex cord-stromal tumor and is usually observed in young women. It is identified by its admixture of ovarian and testicular tissues or cells. The most important clinical manifestation is hormonal dysfunction. Because this tumor is hormonally active, patients afflicted with it could present with either estrogenic or androgenic symptoms [4]. Gynandroblastoma with JGCT is very rare with only 6 of 28 gynandroblastoma cases reported in the English literature to date [2,3,5-8]. All reported cases occurred in premenopausal women between 15 and 39 years old. Our case is the first gynandroblastoma with JGCT diagnosed in a 71-year-old postmenopausal elderly woman. Approximately 97% of JGCTs occur during the first three decades of life. Only a few known cases of JGCT occurred in women > 30 years old; just two cases of JGCT as a component of gynandroblastoma have been reported in patients over the age of 30 [2,7]. Thus, our case of gynandroblastoma with JGCT in a postmenopausal woman is extremely unusual. However, the JGCT component of our patient’s tumor showed typical histologic features, such as variously sized follicles that contained basophilic secretions.
The tumor diagnosis was based on histologic features. The diagnostic criteria for gynandroblastoma indicate that the minor tumor component (either Sertoli-Leydig cells in a GCT, or granulosa cells in an SLT) should account for at least 10% of the entire tumor. Sometimes, well-differentiated Sertoli-Leydig cells can be focally observed in GCTs and vice versa. Therefore, sufficient tumor sampling is essential for an accurate diagnosis. Although most reported GCT cases are of the adult-type, a juvenile-type has also been identified. The histology of adult-type and juveniletype cells is the same for GCT; therefore, it is not difficult to diagnose these tumors. Several immunohistochemical markers exist to aid differential diagnosis, but these markers are used to diagnosis every type of ovarian sex cord-stromal tumor and they are not specific to gynandroblastoma. The representative sex cord-stromal cell markers include inhibin, calretinin, SF1, WT-1, and CD99 [2]. MART-1/melan-A is a marker specific to SLT and steroid cell tumors [9]. Additionally, the cell cycle regulatory protein 14-3-3 sigma was recently identified as a diagnostic marker for GCT and steroid cell tumors [10]. In our case, both JGCT and SLT components were positive for inhibin and calretinin.
The histogenesis of gynandroblastoma is unknown, but it is generally assumed that it originates from a single progenitor cell that can differentiate into both female and male elements [11]. During embryogenesis, gonadal tissues develop from the mesoderm of the urogenital ridge and the ridge organizes the endocrinologically active tissues of the gonad, which includes granulosa cells, Sertoli cells, theca cells, ovarian stromal cells, and Leydig cells [12]. Gynandroblastoma and other sex cord-stromal tumors are considered to have their origin in the cells of the urogenital ridge.
It is difficult to characterize the biological behavior of gynandroblastoma due to its extremely low incidence. Based on the reported cases, it appears to have a benign course. The majority of gynandroblastomas were stage I tumors and most patients with stage I gynandroblastoma were successfully treated by simple surgical resection with regular follow-up. Only one recurrence case has been reported, in which the tumor reportedly recurred 10 years after the original tumor was surgically removed [4]. Likewise, our patient had a stage I tumor without extra-ovarian involvement. Currently, 26-month postsurgery, the patient has not shown any clinical evidence of recurrence. Given the evidence from previous reports and our current case, gynandroblastoma has a relatively benign clinical course, and our patient appears to have had a low-grade tumor.
Recently, several genetic studies of ovarian sex cord-stromal tumors focusing on cytogenetic alterations have been published [13]. The most widely studied genetic change is the FOXL2 mutation C134W (402 C > G) found in GCTs [14]. FOXL2 is a transcription factor that is restrictedly expressed in granulosa cells during development and adulthood [15]. This mutation is widely observed in adult type-GCT and can be a diagnostic or prognostic marker [15-17]. Approximately 30% of JGCT tumors harbor the gsp oncogene and 60% contain the AKT1 gene mutation [18,19]. These biological markers have the potential to be of therapeutic value. Regarding SLT, somatic or germline mutations of DICER1, which encodes an RNase III endonuclease, are well-known genetic alterations [13]. Somatic hot spot mutations of DICER1 have been observed in approximately 60% of SLTs [20]. These frequent genetic changes of sex-cord stromal tumors had been understudied with regard gynandroblastoma. Oparka et al. [11] evaluated the C134W (402 C > G) FOXL2 mutation, a frequently observed mutation in adult-type GCT, in seven gynandroblastomas. This mutation was not detected in any GCT or SLT component of gynandroblastoma cases. However, other researchers observed FOXL2 mutations in both GCT and SLT components of two gynandroblastomas and DICER1 mutations were also observed in a few cases [13]. The therapeutic or diagnostic value of these mutations for gynandroblastoma should be studied.
In conclusion, gynandroblastoma is an ovarian sex cord-stromal tumor with both male and female elements. Gynandroblastoma with JCGT is very rare and it typically occurs in women of reproductive age. However, it can also occur in postmenopausal women. The pathogenesis and biologic behavior of gynandroblastoma are still not well known. However, based on the limited number of previous studies, this tumor shares many clinicopathologic characteristics with other sex-cord stromal tumors, including GCT and SLT. More comprehensive histologic and genetic studies are needed.

Conflicts of Interest

No potential conflict of interest relevant to this article was reported.

Fig. 1.
Pelvic computed tomography (CT) and ultrasonography findings. (A) Pelvic CT reveals a large multilocular cystic mass (arrow) with a solid component. (B) Ultrasonography shows a cystic mass (arrow) of approximately 13 cm arising from the right adnexa.
jptm-2018-06-28f1.jpg
Fig. 2.
Gross findings. (A) A 13.0×7.5×6.5-cm multilocular cystic and solid mass replaced the entire ovary. (B) The cysts were filled with serosanguinous fluid and approximately 30% of the mass was solid, hard, and yellow.
jptm-2018-06-28f2.jpg
Fig. 3.
Microscopic findings. (A) The tumor was composed of a Sertoli-Leydig cell tumor (SLT) and a juvenile granulosa cell tumor (JGCT). (B) The JGCT shows solid and nodular growth patterns with relatively uniform tumor cells. (C) Various sized follicles with mucin-like basophilic secretions are also frequently observed. (D) The tumor cells were rounded and had hyperchromatic nuclei without nuclear grooves, which are the characteristic features of adult granulosa cell tumors. (E) A well-differentiated SLT component is also identified. (F) Sertoli cells formed hollow tubules with delicate fibrous stroma. Small clusters of Leydig cells are observed in the fibrous stroma. (G, H) The immunohistochemical staining results confirms that the tumor was of sex cord-stromal origin. Both components stained positive for calretinin (G, left, SLT; right, JGCT) and inhibin (H, left, SLT; right, JGCT).
jptm-2018-06-28f3.jpg
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