Full Text - Acta Endocrinologica
Transcription
Full Text - Acta Endocrinologica
doi: 10.4183/aeb.2015.381 Case Report Secreting ovarian Leydig cell tumor with complex CLINICAL features: virilizing syndrome, polyglobulia, hypertension, dyslipidemia and uterine fibromatosis C.M.V. Ghervan1,*, C. Nemes5, D. Muresan2, D. Crisan3, L. Ghervan4 University of Medicine and Pharmacy, 1Dept. Endocrinology, 2Dept. Obstetrics and Gynecology I, 3Dept. Pathology, 4Institute of Clinical Urology and Renal Transplantation, Dept. Urology, Cluj-Napoca, Cluj, 5 Emergency County Hospital, Dept. Endocrinology, Satu-Mare, Romania Abstract Background. Virilizing syndrome in a postmenopausal woman is a concerning matter, raising the suspicion of androgen-secreting tumour. Case report. A 65 years old woman presented with severe virilization features evolving rapidly over 4 years, accompanied by: severe polyglobulia, severe hypertension, dyslipidemia and uterine fibromatosis compressing both ureters, producing first degree hydroureteronephrosis. The hormonal dosages showed very high levels of both testosterone (15.5 ng/mL) and estradiol (299 pg/mL), meanwhile DHEAS level was normal, indicating an ovarian pathological secretion. The endovaginal ultrasound and computed tomography scan revealed an enlarged right ovary of 5.5/2.8 cm. A total hysterectomy and bilateral oophorectomy was performed. Pathological examination confirmed the diagnosis of right ovarian hilum Leydig cell tumour. After surgery, the testosterone and estradiol levels normalized (concordant to the age and menopausal status), the virilizing syndrome progressively improved and polyglobulia, hypertension and dyslipidemia remitted showing their secondary etiology. Conclusion. We present a very rare case of secreting ovarian Leydig cell tumour in a postmenopausal woman, showing besides the virilizing syndrome, four unusual features: severe polyglobulia, due to androgen excess, severe hypertension and dyslipidemia, all remitted after tumour removal, and severe compressive uterine fibromatosis that was the consequence of the estrogen excess. Key words: ovarian Leydig cell tumour, polyglobulia, virilizing syndrome, secondary hypertension. Introduction The virilizing syndrome is defined as the association of severe hirsutism, clitoromegaly, deepening of the voice and alopecia occurring in a woman. It is caused by the excess of androgen hormones secreted by the adrenal glands, the ovaries or of exogenous origin. This syndrome, especially when it occurs in post-menopausal women, raises the suspicion of androgen hypersecretion by an adrenal or an ovarian tumour. Other possible causes at this age are: hyperthecosis, Cushing’s syndrome, congenital adrenal hyperplasia (extremely rare to be diagnosed at menopause age) and iatrogenesis. Adrenal androgen-secreting tumours are rare and highly suggestive of malignancy. Ovarian androgen secreting tumours are also rare but mainly benign; seldom, these tumours may be driven by the high levels of the gonadotropins seen in the post-menopausal state (1, 2). The majority of functioning ovarian tumours are sex cord-stromal tumours and comprise only approximately 8% of ovarian neoplasms. A sex cordstromal tumour is composed of: granulosa cells, theca cells, Sertoli cells, Leydig cells and fibroblasts of stromal origin, single or in various combinations (3). Leydig cell tumour is a rare member of this group that accounts for less than 0.1% of all ovarian tumours. They are usually benign, unilateral and more frequently appear in post-menopausal women. Histologically, they are characterized by the presence of Reinke crystalloids in the steroid cells, present in more than 50% of these tumours (4, 5). These tumours may secrete large amounts of testosterone that may produce rapidly progressing androgenic effects manifested by the virilizing syndrome. Testosterone also stimulates renal production of erythropoietin and has a direct effect on erythropoietic stem cells, erythrocytosis being a well known adverse effect of overtreatment with androgen hormones, but erythrocytosis due to testosterone over production from an ovarian Leydig cell tumour was *Correspondence to: Cristina Mariana Valeria Ghervan MD, University of Medicine and Pharmacy, Endocrinology, 3 Pasteur street, ClujNapoca, Cluj, 400349, Romania, E-mail: [email protected] Acta Endocrinologica (Buc), vol. XI, no. 3, p. 381-388, 2015 381 C.M.V. Ghervan et al. very rarely reported (5). Occasionally, these tumours may exhibit a hyperestrogenic state, determining vaginal bleeding and/or uterine leiomyoma. Leydig cell tumours are usually benign, with an excellent prognosis and reversion of symptoms after surgical treatment (6). Case report A 65-year-old post-menopausal woman was admitted to our service presenting progressive and rapidly evolving virilizing syndrome: she had a 5-year history of severe facial and body hirsutism, male-pattern baldness, voice deepening, seborrhea and sweating. The last menstrual bleeding was at age of 57 preceded by one year of irregular menses and succeeded by four years of hot flushes. Her reproductive history was uneventful: menarche occurred at 16 years old, with rhythmic normal menstruation; she had 3 pregnancies, one spontaneous abortion and 2 normal births. One year before, she was diagnosed with erythrocytosis interpreted by the hematologist as myeloproliferative syndrome (Polycythemia Vera) requiring repeated phlebotomy and chemotherapy with Hydroxyurea 1000 mg/day. Five years before she has been diagnosed with severe hypertension and treated with an association of four antihypertensive drugs (beta1 receptor blocker, calcium channel blocker, diuretic, angiotensin converting enzyme inhibitor) with poor control of blood pressure values. She was a nonsmoker and consumed no alcohol. The physical examination showed: severe hirsutism of the face, chest, abdomen, shoulders and legs (score 33, Ferriman-Gallwey scale); frontotemporal baldness, plethora, hyperpigmentation of areole, extended pubic hair, clitoromegaly, male habitus, well defined hypertrophic muscle masses and centripetal obesity (Fig. 1). Her blood pressure was 150/100 mmHg with medication. The hormonal evaluation showed markedly elevated levels of total testosterone and estradiol, with suppressed levels of gonadotropins: luteinising hormone (LH) and follicle stimulating hormone (FSH), in discordance with the post-menopausal status, suggesting a secreting neoplasm (Table 1). Dehydroepiandrosterone sulphate (DHEAS) level was normal and computed tomography (CT) of the abdomen showed normal adrenals, excluding adrenal hypersecretion. Prolactin (PRL) level was slightly elevated, cortisol level and thyroid function were in normal ranges (Table 1). As the patient also Table 1. Hormone levels at diagnosis and two months after surgery: FSH = Follicle stimulating hormone, LH= Luteinizing hormone, DHEAS = Dehidroepiandrosterone sulphate, PRL = Prolactine, TSH = Thyrotropin hormone, FT4 = Free thyroxine, IGF1 = Insuline growth factor one, GH = Growth hormone Hormone levels Figure 1. The clinical appearance of the patient at the moment of diagnosis. 382 FSH (n.r. 30-150 U/L) LH (n.r. 8.2-41 U/L) Testosterone (n.r. 0.2-1 ng/mL) DHEAS (0.9-3.6 μg/mL) Estradiol (n.r. 15-60 pg/mL) PRL (n.r. 1.3-20 ng/mL) Cortisol (n.r. 5-25 μg/dL) TSH (n.r. 0,4-4 μUI/mL) FT4 (n.r. 0,89-1,76 ng/dL) IGF1 (n.r. 29-204ng/mL) GH nadir (n.r.< 1 ng/mL) At diagnosis 0.09 0.16 15.5 2.3 299 27.6 13.2 1.49 1 198.6 0.08 2 months after surgery 31.1 23.8 0.15 0.6 24.5 Ovarian Leydig cell tumor Figure 2. CT scan showing enlarged uterus (grey arrow) and enlarged and inhomogeneous right ovary (white arrow). Figure 4. Macroscopy: right enlarged ovary (5/3/1.5 cm) with nodular aspect on section, brown with whitish areas and purple streaks. Figure 5. Microscopy (HEX20) of the ovarian tumor: medium-sized cells with diffuse disposal, finely granular eosinophilic cytoplasm and lipofuscin deposits, with rounded or slightly oval nucleus, along with the presence of prominent nucleoli. Some vessels show parietal fibrinoid deposits. showed some clinical signs of growth hormone excess (enlargement of the nose and lips, prognathism, teeth spacing, hyperhidrosis along with hypertrichosis Figure 3. CT scan showing bilateral hydronephrosis (white arrows). and increased sebum production) IGF1 level and GH suppression during glucose tolerance test were measured, with normal results, excluding acromegaly (Table 1). The MRI of the brain focusing on the sella turcica after gadolinium administration showed a 3.2 mm pituitary microadenoma, which, in the light of the mentioned hormonal assays, was interpreted as an incidental non-secreting pituitary adenoma. The hemoglobin concentration (14.9 g/dL), hematocrit (42.8%) and red blood cell count of (3.45x106/mm3) were normalized under hydroxyurea treatment. Transvaginal ultrasound revealed a uterus of 20x15 cm with myomatosis pattern and an endometrial thickness of 11 mm; the right ovary was enlarged (5.5 x 2.8 cm) with inhomogeneous structure. These findings were confirmed by computer tomography (CT) scan (Fig. 2). CT scan also revealed a compressive effect of the uterus on the urinary bladder and on both ureters with first degree ureterohydronephrosis (Fig. 3). Urologic exam, including cystoscopy, excluded other causes of bilateral ureterohydronephrosis. The final diagnosis being: androgen and estrogen secreting tumour of the right ovary, the surgical cure was performed (abdominal hysterectomy and bilateral salpingo-oophorectomy). The pathological exam showed an enlarged uterus with diffuse myometrial hypertrophy (7 cm maximum thickness) and the presence of an intramural leiomyoma of 1 cm diameter. The right ovary was enlarged (5/3/1.5 cm) with nodular aspect on section, brown with whitish areas and purple streaks (Fig. 4). The microscopy showed a well-delimited tumoral proliferation, composed of medium-sized cells with 383 C.M.V. Ghervan et al. A B C Figure 6. Immunohistochemistry of the ovarian tumor: positive for inhibin (A), vimentin (B) and calretinin (C). Table 2. The anthropometric and biologic parameters before and two months after surgery. BMI = Body mass index Parameter Before surgery Weight (kg) 87 BMI (n.r. 17.5-25 kg/m2) 34.19 Waist (< 80 cm) 102 108 Hips (cm) Red blood cells count (n.r 4.2-5.4x106) 6.21x106 Hematocrit (n.r. 38-48%) 62.5 % Hemoglobin (n.r. 12-16 gr/dL 21.2 138* Total cholesterol (n.r. 170-200 mg/dL) 101* Triglycerides (n.r. < 150 mg/dL) 89 Glycemia (n.r. 70-99 mg/dL) 2 months after surgery 83 32.62 97 110 3.4x106 36.5 12.7 206˟ 125 ˟ 101 *with 20 mg Atorvastatin ˟ without treatment diffuse disposal, finely granular eosinophilic cytoplasm and lipofuscin deposits, with rounded or slightly oval nucleus, along with the presence of prominent nucleoli (Fig. 5). Focal nuclear agglomerations were present, separated by eosinophilic areas and also small areas of focal hemorrhage and cystic degeneration were found. Some vessels showed parietal fibrinoid deposits. Microscopic examination did not reveal Reinke crystalloids. Immunohistochemistry showed that the tumour cells were positive for: inhibine, vimentin and calretinin (Fig. 6); negative for pancytokeratine, AE1/ AE3 and focal positive for alpha–fetoprotein. The histological and immunohistochemical aspect was highly suggestive for a Leydig hilus cell tumour, even in the absence of Reinke crystalloids. The left ovary (2.5/1.5/0.5 cm) was normal. Four days after surgery, serum testosterone and estradiol levels normalized (testosterone = 0.15 ng/ ml, estradiol = 31.5 pg/mL). Two months after the surgery, the patient was asymptomatic, normotensive without medication (130/80 mmHg), showing regression of the virilizing syndrome (growth of capillary hair and improvement of hirsutism (score 28 on Ferriman-Gallwey scale). 384 The serum testosterone and DHEA-S were low, LH, FSH and estradiol have returned to normal levels for a post-menopausal state (Table 1). AFP level was normal (1.91 ng/ml, n.r.<7). Total blood count showed mild megaloblastic anemia, the treatment with hydroxyurea being interrupted one month before (Table 2). Before surgery the patient presented also dyslipidemia, controlled with statins which remitted after surgery. A slightly increase in glycemia was noted. Upon follow-up, there was decreased weight and abdominal circumference (Table 2). The patient signed an informed consent to the publication of her case, with data and unidentifying images. Discussion The occurrence of hirsutism accompanied by signs of virilization such as alopecia, deepening of the voice, or clitoromegaly, must always raise the suspicion of an underlying androgen-secreting tumour. Postmenopausal virilization may result from adrenal tumours, including androgen-secreting carcinomas and adenomas or from ovarian tumours, including Sertoli and/or Leydig cell tumours, granulosa-theca cell tumours, and hilus-cell tumours; there are also benign ovarian conditions such as ovarian stromal hyperplasia and hyperthecosis (7). After menopause ovarian causes of virilization are more common than adrenal ones (6). The clinical history is very important – the absence of the symptoms before menopause excluding the functional causes of hyperandrogenism such as: polycystic ovary syndrome, hyperthecosis, or nonclassic congenital adrenal hyperplasia which appear around puberty, progress slowly and worsen after menopause. More severe causes of hyperandrogenism, including tumours, are rare around puberty, progress rapidly and associate signs of virilization or defeminization (2, 4, 7-9). In our case the patient was asymptomatic before menopause, without hirsutism, infertility or menstrual Ovarian Leydig cell tumor disturbances, the signs of virilization appearing 5 years previous, so tumoral etiology was more probable. There are not established cut-off values for androgens that direct toward the source of hyperandrogenism, but a total testosterone above 150– 200 ng/dl and/or DHEAS level above 600 µg/dL may suggest an androgen-secreting neoplasm (10). The lowdose dexamethasone suppression test has been proposed to distinguish tumour secretion from non-neoplastic causes of hyperandrogenism, because both adrenal and ovarian tumours would fail to suppress androgen levels after glucocorticoid administration (11, 12). Similarly, suppression of hyperandrogenism in response to longacting GnRH agonists in postmenopausal women would be suggestive of gonadotropin dependent ovarian secretion (13). Concerning the tumour adrenal source of the androgen excess, rarely, adrenal tumours are adenomas that secrete mostly testosterone; more frequently adrenal tumours are carcinomas that often over secrete not only androgens (mostly DHEA and DHEA-S), but also cortisol (2, 6, 7, 9, 14). In our case, the normal DHEAS and cortisol levels and the normal appearance of adrenals in CT excluded the adrenal origin of hypersecretion. The high testosterone and estradiol levels, in the presence of suppressed gonadotropins, oriented toward an autonomous secreting ovarian tumour. The high level of estradiol may be due to estrogen secretion by the tumour, to peripheral conversion of testosterone, to associated stromal hyperthecosis or to a combination of these factors (4-6). Huge uterus hyperplasia compressing the ureters, leiomyoma, endometrial hyperplasia and hyperprolactinemia are highly unusual in a postmenopausal woman and were the consequences of estradiol excess. CT and magnetic resonance imaging (MRI) scanning of the adrenal glands are sensitive tests for confirming the presence of an adrenal adenoma or adenocarcinoma which is usually greater than 1 cm in diameter, and in the latter, even greater than 6 cm in diameter. Androgen-secreting ovarian tumours are frequently small (< 4 cm) solid masses, with nonspecific ultrasonographic appearances and unilateral in 95% of cases. These are very difficult to diagnose by conventional radiological imaging methods like ultrasound and CT scanning, because of their small size and in part because they are isoechoic to the uterus on ultrasound, and isodense on CT. Ultrasound examination, using a combination of transabdominal ultrasonography and transvaginal ultrasonography, is the procedure of choice when imaging ovaries in the evaluation of hyperandrogenism (2, 5, 6, 8). In our patient, previous ultrasound examination missed the enlarged right ovary and even at the time of diagnosis when the search of an ovarian tumour was obvious, CT exam first missed the ovarian tumour and focused on the enlarged and inhomogeneous uterus compressing the urinary bladder and both ureters, with secondary ureterohydronephrosis. As the clinical and hormonal arguments pointed to an ovarian tumour, a second opinion on the CT exam was demanded, which confirmed a slightly enlarged right ovary, without precise tumour image, result that was reproduced by the transvaginal sonographic examination. Ovarian and/or adrenal selective venous sampling was used in some cases to localize the androgen source, when conventional radiological imaging methods failed (1, 2, 7), but this exam was not available. In doubtful cases, in post-menopausal women with virilization syndrome and elevated testosterone levels, most of the authors recommend that an oophorectomy should be considered after the exclusion of adrenal causes (5, 6). In our case, the decision for surgery was facilitated by the aspect of the uterus, compressing the bladder and the ureters, even if, in the absence of the venous sampling we were not completely convinced of the ovarian tumour. The intra-operatory tumoral aspect of the right ovary confirmed our clinical judgment and justified the bilateral oophorectomy accompanying the hysterectomy. A conservative surgery with unilateral salpingo-oophorectomy is justified reasonable only for premenopausal patients who want to preserve their fertility (4). In the rare case of gonadotropin dependent ovarian androgen-producing tumour, the use of a gonadotropin releasing hormone analogue is a good option when surgery is not straightforward because of high surgical risk (1, 15). Ovarian androgen secreting tumours are very rare entities, affecting only 1:300-1000 of patients with hirsutism. Leydig cell tumours belong to the group of sex-cord stromal tumours of the ovary, and account for less than 0.1% of all ovarian tumours (5). They are seen most often in post-menopausal women and are almost always benign, with excellent prognosis. They cause hirsutism and virilization in 75% of cases due to the clinically significant amounts of androgens produced (5, 9). This tumour is distinguished from the SertoliLeydig cell tumour by the absence of the follicular granulosa cells which are homologue of Sertoli cells in the testis (4). Some ovarian Leydig cell tumours arise in the hilus from hilar Leydig cells, which can 385 C.M.V. Ghervan et al. be identified in over 80% of normal adult ovaries. Other Leydig cells tumours that are located within the ovarian stroma are referred to as non-hilar Leydig cell tumours, and the term Leydig cell not otherwise specified is used when it is impossible to be certain about the origin (4). These tumours are solid, fleshy and well circumscribed and appear yellow, orange or more commonly brownish in color. Histologically they consist of cells with abundant cytoplasm, eosinophilic or clear and vacuolated. Reinke crystalloids (RC) are pathognomonic for the diagnosis of Leydig cell tumour. They are elongated, hexagonal eosinophilic crystals present in the cytoplasm or rarely in the nucleus. They are found in just more than 50% of these tumours but are irregularly distributed in the tumour and thus may require extensive searching to locate them (5, 9, 16). A paper published by Paraschevas M and Al in 1989, comparing hilus Leydig cell tumours with and without RC showed that tumours RC negative are secreting both androgen and estrogen hormones in 44% of cases, meanwhile, the tumours RC positive are secreting only androgens (27). Our patient’s tumour was RC negative, so a cosecretion of both hormones is probable. Many immunohistochemical markers have been identified for the differential diagnosis of sex cord stromal tumours, and inhibin was found to be particularly useful in differentiating sex cord stromal from non sex cord stromal tumours. Although some of these tumours are cytokeratin AE1/AE3 positive, epithelial membrane antigen (EMA) negativity may be useful for the differential diagnosis with epithelial ovarian tumours. Inhibin, a hormonal polypeptide, is present in ovarian granulosa and lutein cells, as well as testicular (Sertoli’s) and Leydig cells, and suppresses the production of pituitary gonadotropins, particularly FSH. The tumour Leydig cells have negative reactivity for keratins and show positive immunoreactivity for vimentin (75% of cases) and for inhibin (91% of cases) (3, 17-20). In our case the histological and immunohistochemical aspect was highly suggestive for a Leydig hilar cell tumour even in the absence of Reinke crystalloids. There were also tumour cells focally positive for alfa–fetoprotein, which are rarely associated with Leydig cell tumours (21). Postoperative follow-up revealed serum AFP level within normal limits. Androgen excess stimulates bone marrow and increases the production of red blood cells and also stimulates the renal production of erythropoietin. Secondary erythrocytosis due to androgen excess is most commonly seen in the context of testosterone 386 replacement therapy in men, but the association of androgen-secreting tumour and erythrocytosis has been reported only in a few cases: in a man with gonadotropinsecreting seminoma of the testis (22) and in another patient with an endometriod tumour (23). In 2011 Yetkin et al. presented the first case of a Leydig cell ovarian tumour with an erythropoietic effect of testosterone excess (5). Saraceno et al., in 2013, reported the case of a middle-age woman affected by a breast cancer and by an occult androgen secreting Leydig cell tumour of the ovary causing erythrocytosis (24). Recently, Pelusi et al. described two similar cases of polycythaemia in their group of post-menopausal women with severe hyperandrogenism caused by Leydig cell tumours (25). Kozan et al. 2014 presented a post-menopausal woman with extreme hyperandrogenism, erythrocytosis and recurrent pulmonary embolism also due to a Leydig cell tumour of the ovary (26). Our patient was diagnosed with severe erythrocytosis, interpreted as mieloproliferative disorder (Polycitemia vera) one year before the diagnosis of the ovarian tumour, requiring repeated phlebotomies and chemotherapy with hydroxyurea. After surgery, the blood parameters normalized, confirming that the erythrocytosis was secondary to androgen excess and the diagnosis of mieloproliferative disorder was erronate, which significantly improves the survival prognosis and also the quality of life prognosis for this patient. Our patient also developed severe hypertension, poorly controlled with four antihypertensive drugs, interpreted by the cardiologist as primary hypertension, which miraculously remitted after the tumour ablation. Stephen et al. in 1998 reported a case of a steroid cell ovarian tumour with androgen and renin cosecretion, presenting with virilization, erythrocytosis and hypertension (28). In our case, although plasmatic renin was not measured, a cosecretion is very probable since blood pressure normalized after the tumour removal and the antihypertensive medication had to be stopped. Metabolic abnormalities including insulin resistance, dyslipidemia and abdominal fat distribution are common features of women with hyperandrogenism, particularly those with polycystic ovary syndrome (PCOS), who are additionally at high risk of early development of type2 diabetes and possibly cardiovascular disease. In a recent study of 5 women with ovarian androgen-secreting tumours, Pelusi et al. observed that four of the five patients with baseline normal glucose values had a modest but significant increase, always in the normal range, in glucose levels but no significant change in insulin or HOMA- Ovarian Leydig cell tumor IR values after surgery. In our patient, similarly to these patients, a slight increase in basal glycemia was noted after surgery. In the diabetic patient, values of hemoglobin A1c decreased by 0.7% and her body mass index fell from 30.4 kg/m2 to 28.9 kg/m2 indicating that the metabolic impact of androgen normalization is different in diabetic patients compared to non-diabetic patients. Fasting levels of total serum cholesterol, HDL cholesterol, LDL cholesterol and triglycerides were within normal limits at baseline and did not show any significant variation with androgen normalization after surgery in any subjects. The hypothesis for the lack of impact of severe hyperandrogenism in women with ovarian androgen-secreting tumours was that very high testosterone concentrations may be ineffective on tissue metabolism, because of profound downregulation of its receptors, which cause a significant decrease in cellular responsiveness and also by the timing and duration of tissue exposure to high androgen levels, that might play an important role in the future development of metabolic abnormalities (25). In another case report, Rivera-Arkoncel et al. presented a patient with a pure Leydig cell ovarian tumour and metabolic syndrome who presented a decreased weight and abdominal circumference and improvement in metabolic parameters after tumour removal (9). Our patient presented abdominal obesity and dyslipidemia (controlled with statins). After surgery the lipid profile improved and the statin treatment was interrupted. There was also a decrease in weight and in abdominal circumference (Table 2). The last particular aspect of this case is the presence of the dysmorphic acromegalic syndrome and a pituitary microadenoma image on IRM, concomitant with normal hormonal results excluding a growth hormone excess. In this context we can hypothesize a spontaneous necrosis of a previously functioning GH secreting adenoma, as reported in few other cases (29-31), or an incidentaloma. A further surveillance of IGF1 levels was proposed to the patient. In conclusion, we present here the very rare case of a hilus Leydig cell ovarian tumour in a postmenopausal woman, presenting with severe and rapidly evolving virilizing syndrome and also with rarely (and for the first time simultaneously) described complications of the hormonal excess: severe erythrocytosis, giant compressive uterine fibromatosis, severe hypertension and dyslipidemia, all remitted after tumour removal and hormonal normalization. Conflict of interest The authors declare that they have no conflict of interest concerning this article. References 1. Stephens JW, Katz JR, McDermott N, MacLean AB, Bouloux PM. An unusual steroid-producing ovarian tumor: case report. Hum Reprod. 2002;17(6):1468-1471. 2. Sarfati J, Bachelot A, Coussieu C, Meduri G, Touraine P. Impact of clinical, hormonal, radiological, and immunohistochemical studies on the diagnosis of postmenopausal hyperandrogenism. Eur J Endocrinol. 2011;165(5):779-788. 3. Wilkinson N, Osborn S, Young RH. Sex cord-stromal tumors of the ovary: a review highlighting recent advances. Diagnostic Histopathology. 2008;14(8):388-400. 4. Aminimoghaddam S, Ebrahimi AS, Hashemi F. A rare ovarian tumor, Leydig stromal cell tumor, presenting with virilization: a case report. Med J Islam Repub Iran. 2012;26(4):185-188. 5. Yetkin DO, Demirsoy ET, Kadioglu P. Pure Leydig cell tumor of the ovary in a post-menopausal patient with severe hyperandrogenism and erythrocytosis. Gynecol Endocrinol. 2011;27(4):237-240. 6. Souto SB, Baptista PV, Braga DC, Carvalho D. Ovarian Leydig cell tumor in a post-menopausal patient with severe hyperandrogenism. Arq Bras Endocrinol Metabol. 2014;58(1):68-75. 7. Alpañés M, González-Casbas JM, Sánchez J, Pián H, EscobarMorreale HF. Management of postmenopausal virilization. J Clin Endocrinol Metab. 2012;97(8):2584-2588. 8. Dennedy MC, Smith D, O’Shea D, McKenna TJ. Investigation of patients with atypical or severe hyperandrogenaemia including androgen-secreting ovarian teratoma. Eur J Endocrinol. 2010;162(2):213-220. 9. Rivera-Arkoncel ML, Pacquing-Songco D, Lantion-Ang FL. Virilizing ovarian tumor in a woman with an adrenal nodule. BMJ Case Rep. 2010 Dec 14;2010, Published online 2010 December 15. doi: 10.1136/bcr.07.2010.3139. 10. Azziz R, Carmina E, Dewailly D, Diamanti-Kandarakis E, Escobar-Morreale HF, Futterweit W, Janssen OE, Legro RS, Norman RJ, Taylor AE, Witchel SF. The Androgen Excess and PCOS Society criteria for the polycystic ovary syndrome: the complete task force report. Fertil Steril. 2009;91(2):456–488. 11. Kaltsas GA, Isidori AM, Kola BP, Skelly RH, Chew SL, Jenkins PJ, Monson JP, Grossman AB, Besser GM. The value of the low dose dexamethasone suppression test in the differential diagnosis of hyperandrogenism in women. J Clin Endocrinol Metab.2003; 88(6):2634–2643. 12. Derksen J, Nagesser SK, Meinders AE, Haak HR, van de Velde CJ. Identification of virilizing adrenal tumors in hirsute women. N Engl J Med. 1994;331(15):968–973. 13. Vollaard ES, van Beek AP, Verburg FA, Roos A, Land JA. Gonadotropin-releasing hormone agonist treatment in postmenopausal women with hyperandrogenism of ovarian origin. J Clin Endocrinol Metab 2011;96(5):1197–1201. 14. Frysak Z, Karasek D, Hartmann I, Kucerova L. Secondary hypertension and hirsutism as a clinical manifestation of tumor duplicity. Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub. 2013 Jul 29 doi: 10.5507/bp.2013.056. [Epub ahead of print] 15. Wang PH, Chao HT, Liu RS, Cho YH, Ng HT, Yuan CC. Diagnosis and localization of testosterone-producing ovarian tumors: imaging or biochemical evaluation. Gynecol Oncol. 2001;83(3):596-598. 387 C.M.V. Ghervan et al. 16. Marcelino M, Nobre E, Conceição J, Lopes L, Vilar H, França Martins M, Carvalho A, André S, Horta A, De Castro JJ. A rare case of hyperandrogenism: bilateral Leydig cell tumor of the ovary. Acta Med Port. 2010;23(1):113-118. 17. Gheorghisan-Galateanu A, Fica S, Terzea DC, Caragheorgheopol A, Horhoianu V. Sertoli-Leydig cell tumor - a rare androgen secreting ovarian tumor in postmenopausal women. Case report and review of literature. J Cell Mol Med. 2003;7(4):461-471. 18. Haroon S, Zia A, Idrees R, Memon A, Fatima S, Kayani N. Clinicopathological spectrum of ovarian sex cord-stromal tumors; 20 years’ retrospective study in a developing country. J Ovarian Res. 2013 Dec 5;6(1):87. Published online 2013 December 5. doi: 10.1186/1757-2215-6-87. 19. Wan J, Chen X, Li X. Ovarian steroid cell tumor, not otherwise specified: A rare case of postmenopausal vaginal bleeding. Oncol Lett. 2014;8(3):1187-1189. 20. Deavers MT, Malpica A, Liu J, Broaddus R, Silva EG. Ovarian sex cord-stromal tumors: an immunohistochemical study including a comparison of calretinin and inhibin. Mol Pathol. 2003;16(6):584590. 21. Jashnani KD, Hegde CV, Munot SP. Alfa-fetoprotein secreting ovarian sex cord-stromal tumor. Indian J Pathol Microbiol. 2013;56(1):54-56. 22. Reman O, Reznik Y, Casadevall N. Polycythemia and steroid overproduction in a gonadotropin-secreting seminoma of the testis. Cancer.1991;68(10):2224–2229. 23. Girsh T, Lamb MP, Rollason TP, Brown LJ. An endometrioid tumour of the ovary presenting with hyperandrogenism, secondary polycythaemia and hypertension. BJOG. 2001;108(3):330–332. 388 24. Saraceno G, Barresi V, Trimarchi F, Cannavo S. Occult Leydig cell tumour and androgen-receptor positive breast cancer in a woman with severe hyperandrogenism. J Ovarian Res. 2013;6(1):43 25. Pelusi C, Forlani G, Zanotti L, Gambineri A, Pasquali R. No metabolic impact of surgical normalization of hyperandrogenism in postmenopausal women with ovarian androgen-secreting tumours. Clin Endocrinol (Oxf). 2013;78(4):533-538. 26. Kozan P, Chalasani S, Handelsman DJ, Pike AH, Crawford BA. A Leydig cell tumor of the ovary resulting in extreme hyperandrogenism, erythrocytosis, and recurrent pulmonary embolism. J Clin Endocrinol Metab. 2014;99(1):12-17. 27. Paraskevas M, Scully RE. Hilus cell tumor of the ovary. A clinicopathological analysis of 12 Reinke crystal-positive and 9 crystal-negative cases. Int J Gynecol Pathol 1989,8(4):299–310. 28. Stephen MR, Lindop GB. A renin secreting ovarian steroid cell tumor associated with secondary polycythaemia. J Clin Pathol. 1998;51(1):75–77. 29. Nishioka H, Haraoka J, Miki T. Spontaneous remission of functioning pituitary adenomas without hypopituitarism following infarctive apoplexy: two case reports. Endocr J. 2005;52(1):117-123. 30. Cinar N, Metin Y, Dagdelen S, Ziyal MI, Soylemezoglu F, Erbas T. Spontaneous remission of acromegaly after infarctive apoplexy with a possible relation to MRI and diabetes mellitus. Neuro Endocrinol Lett. 2013;34(5):339-342. 31. Wang XL, Dou JT, Lü ZH, Zhong WW, Ba JM, Jin D, Lu JM, Pan CY, Mu YM. Spontaneous remission of acromegaly or gigantism due to subclinical apoplexy of pituitary growth hormone adenoma. Chin Med J (Engl). 2011;124(22):3820-3823.