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Pheochromocytoma is a rare and usually benign neuroendocrine neoplasm. Only 10% of all these tumors are malignant and there are no definitive histological or cytological criteria of malignancy. Single malignancy criteria are the presence of advanced locoregional disease or metastases. We report a case, with a giant retroperitoneal tumor having multiple metastases including palpable rib metastases, who was diagnosed as a malignant pheochromocytoma. The patient was treated with surgery. The literature was reviewed to evaluate tumor features and current diagnostic and therapeutic approaches for patients with metastatic or potentially malignant pheochromocytoma.

WOS: 000316925400004, PubMed ID: 23245206, Sheehan's syndrome (SS) is characterized by various degrees of hypopituitarism, and develops as a result of ischemic pituitary necrosis due to severe postpartum hemorrhage. Increased pituitary volume, small sella size, disseminated intravascular coagulation and autoimmunity are the proposed factors in the pathogenesis of SS. Hormonal insufficiencies, ranging from single pituitary hormone insufficiency to total hypopituitarism, are observed in patients. The first most important issue in the diagnosis is being aware of the syndrome. Lack of lactation and failure of menstrual resumption after delivery that complicated with severe hemorrhage are the most important clues in diagnosing SS. The most frequent endocrine disorders are the deficiencies of growth hormone and prolactin. In patients with typical obstetric history, prolactin response to TRH seems to be the most sensitive screening test in diagnosing SS. Other than typical pituitary deficiency, symptoms such as anemia, pancytopenia, osteoporosis, impairment in cognitive functions and impairment in the quality of life are also present in these patients. Treatment of SS is based on the appropriate replacement of deficient hormones. Growth hormone replacement has been found to have positive effects; however, risk to benefit ratio, side effects and cost of the treatment should be taken into account.

Summary Context Crimean-Congo haemorrhagic fever (CCHF) can cause a fatal haemorrhagic syndrome. Pituitary ischaemia/infarction and necrosis are known causes of hypopituitarism, often remaining unrecognized because of subtle clinical manifestations. Objective Our aim was to evaluate the effect of CCHF on pituitary function. Subject and methods Levels of serum free T3, free T4, TSH, GH, IGF-I, prolactin, cortisol, testosterone (in men) and oestrogen (in women) were studied in 20 patients who had been diagnosed with CCHF. TRH, LH-RH and 1 μg adrenocorticotropin tests were performed in all patients. The hypothalamo-pituitary region was examined by magnetic resonance imaging (MRI) in two patients who were diagnosed with hypocortisolism. Results We found cortisol insufficiency in 2 (10%) of the 20 with CCHF. However, hypophyseal MRI findings were normal in these two patients. None of the patients had deficiencies of GH, TSH or FSH/LH. Conclusion To our knowledge, this is the first study reporting the effect of CCHF on pituitary function. We found that cortisol insufficiency may occur in patients diagnosed with CCHF; however, studies including a larger number of patients are required to make a definite conclusion on this issue.

Aims: Alterations in cortisol and dehydroepiandrosterone sulfate (DHEA-S) levels are thought to play a role in the pathophysiology of neuropsychiatric disorders, including schizophrenia. The aim of this study was to investigate the role of serum cortisol and DHEA-S in the pathophysiology of schizophrenia. Methods: Sixty schizophrenic patients, 70 healthy first-degree relatives, and 60 healthy volunteers were included. Sociodemographic characteristics, data regarding disease duration and severity, as well as ongoing and previous drug use were recorded. Serum cortisol and DHEA-S levels were measured. Results: Serum cortisol and DHEA-S levels were significantly higher in the schizophrenia group compared with the first-degree relatives and controls (P

WOS: 000276897900001, PubMed ID: 20408753, Introduction. Plasma carnitine insufficiency has been known to cause muscle weakness. Carnitine levels and pulmonary functions were lower in patients with diabetes. Patients and Methods. To determine whether pulmonary functions are correlated with carnitine levels in patients with type 2 diabetes. In this study, we evaluated pulmonary functions and carnitine concentrations in 49 patients with type 2 diabetes and 34 healthy controls. Results. Carnitine levels were lower in type 2 diabetes group than control group (52.56 +/- 12.38 and 78.96 +/- 10.66 hmol/mL, respectively, p < 0.0001). Pulmonary functions were not significantly different between groups. Carnitine levels were not correlated with age, duration of diabetes, fasting blood glucose levels, and glycemic control (HbA1c%) in patients with type 2 diabetes. However, carnitine levels in patient group were correlated with % forced vital capacity (FVC%) (r = 0.35, p = 0.016), % forced expiratory volume in 1 s (FEV1%) (r = 0.318, p= 0.029), FEV1/FVC (r= 0.302, p= 0.039), inspiratory muscle strength (PImax) (r = 0.407, p = 0.023), and PImax% (r = 0.423, p= 0.018). Conclusion. This study suggests that low carnitine levels may be associated with lower PImax and PImax% in type 2 diabetes.

WOS: 000413852500008, PubMed ID: 26824280, Objective Sclerostin is an osteocyte-secreted endogenous inhibitor of Wnt signaling. Several systemic and local factors have been suggested as possible regulators of sclerostin expression by osteocytes. In this study, we examined the effect of vitamin D treatment on sclerostin levels. Subject and Methods 44 patients with diagnosis of vitamin D deficiency (25(OH)D20ng/ml) were involved in the study. Patients had monthly intramuscular injection of 300.000IU cholecalciferol for 3 consecutive months. Sclerostin, 25(OH)D, parathyroid hormone (PTH), calcium, phosphorus and alkaline phosphatase (ALP) levels were measured during the diagnosis and after the replacement of vitamin D. Results 8 male and 36 female patients were enrolled in the study. Minimum age, maximum age and average age were 21, 55 and 32.02 +/- 9.26 years, respectively. A statistically significant difference was observed between the pre-treatment and post-treatment values in 25(OH)D levels (p:0.001, 10.27 +/- 4.62ng/ml and 51.40 +/- 14.62ng/ml, respectively), PTH levels (p:0.001, 50.32 +/- 19.05pg/ml and 33.97 +/- 13.12pg/ml, respectively) and sclerostin levels (p:0.002, 858.98 +/- 351.63pg/ml and 689.52 +/- 197.92pg/ml, respectively). No statistically significant difference, however, was found between the pre-treatment and post-treatment calcium, phosphorus and ALP levels. Correlation analysis made on pre-treatment and post-treatment sclerostin levels and 25(OH)D, PTH, calcium, phosphorus and ALP levels revealed no statistically significant correlation. Conclusion Our findings show that the sclerostin level of patients with vitamin D deficiency decreases considerably through treatment.

Background and Aims:Crimean Congo hemorrhagic fever can cause a fatal hemorrhagic syndrome. We aimed to investigate whether the presence of Helicobacter pylori increases the bleeding or severity of Crimean Congo hemorrhagic fever. Materials and Methods:Forty-two patients with Crimean Congo hemorrhagic fever who had dyspepsia and were hospitalized between April 2009 and July 2009 were included in the study. The patients were divided into two groups according to their fecal Helicobacter pylori antigen positivity. Clinical and laboratory severity criteria for Crimean Congo hemorrhagic fever were investigated in both groups. Results:We could not find any difference between the two groups with regard to severity as defined by clinical and laboratory criteria. Conclusion: This is the first study in the literature investigating the role of Helicobacter pylori in the severity of Crimean Congo hemorrhagic fever from a country in which both Crimean Congo hemorrhagic fever and Helicobacter pylori are endemic. Further studies including a larger number of Crimean Congo hemorrhagic fever patients are necessary to recommend Helicobacter pylori screening and eradication in Crimean Congo hemorrhagic fever.

WOS: 000239214900009, PubMed ID: 16785150, Sheehan's syndrome occurs as a result of ischemic pituitary necrosis due to severe postpartum hemorrhage. The aim of the present study was to determine the clinical characteristics of Sheehan's syndrome in 20 patients (mean age 60.15 +/- 3.41 years) with typical obstetric history. The mean duration between time of diagnosis and date of the last delivery was 26.82 +/- 2.52 years (range 2-40 years). All patients had a history of massive hemorrhage at delivery and physical signs of Sheehan's syndrome. Fourteen patients (70.0%) lacked postpartum milk production and did not menstruate following delivery. Baseline and stimulated anterior pituitary hormone levels were measured in all patients. According to the hormonal values, 18 (90.0%) patients had secondary hypothyroidism, 11 (55.0%) had adrenal failure and all of them had hypogonadism, prolactin and growth hormone deficiency. Hyponatremia was present in seven patients (35.0%). Total or partially empty sella was revealed in all patients by magnetic resonance imaging. Diabetes insipidus was not found in any patient. We found that lack of lactation in the postpartum period and early menopause seemed the most important clues for diagnosis of Sheehan's syndrome, and inadequate prolactin and gonadotropin responses to stimulation tests were the most sensitive diagnostic signs in patients with severe postpartum hemorrhage.

WOS: 000370356600013, Objectives: In this study, we measured hearing thresholds in patients diagnosed with hyperthyroidism or hypothyroidism with high-frequency audiometry and otoacoustic emission before and after treatment to determine whether hearing losses were cochlear or retrocochlear and whether they would improve with medical therapy. Materials and Methods: This study was conducted on patients diagnosed with hyperthyroidism and hypothyroidism at Cumhuriyet University, Faculty of Medicine, Department of Endocrinology and Metabolism and accepting to participate in the study. We measured the hearing thresholds of the study population during the pretreatment period and in posttreatment euthyroid period. Result: The audiometric findings of patients with hyperthyroidism were better than those of the control group especially at high frequencies. Sensorineural hearing loss was detected in the euthyroid period. We compared the audiometric findings of the patients with hypothyroidism and the controls. We found sensorineural hearing loss in patients with hypothyroidism, especially at low frequencies. Conclusions: The results of this study showed that both hyperthyroidism and hypothyroidism may have an effect on hearing pathway disorders. Medical therapy may lead to hearing loss in patients with hyperthyroidism, and the underlying factors should be investigated in detailed future studies. It was shown in our study that the hearing loss induced by hypothyroidism may improve with medical therapy. Therefore, in all patients with thyroid dysfunction, hearing levels should be monitored closely with audiometric tests.

WOS: 000335651700019, PubMed ID: 24761858, Background: Serum thyroglobulin detection plays an essential role during the follow-up of thyroid cancer patients treated with total/near total thyroidectomy and radioiodine ablation. The aim of this retrospective study was to evaluate the relationship between stimulated serum thyroglobulin (Tg) level at the time of high dose I-131 ablation and risk of recurrence, using a three-level classification in patients with differentiated thyroid cancer (DTC) according to the ATA guidelines. Also we investigated the relationship between postoperative stimulated Tg at the time of ablation and DxWBS results at 8-10 months thereafter. Materials and Methods: Patients with radioiodine accumulation were regarded as scan positive (scan+). If there was no relevant pathological radioiodine accumulation or minimal local accumulation in the thyroid bed region, this were regarded as scan negative (scan-) at the time of DxWBS. We classified patients in 3 groups as low, intermediate and high risk group for assessment of risk of recurrence according to the revised ATA guidelines. Also, we divided patients into 3 groups based on the stimulated serum Tg levels at the time of I-131 ablation therapy. Groups 1-3 consisted of patients who had Tg levels of = 10 ng/ml, respectively. Results: A total of 221 consecutive patients were included. In the high risk group according to the ATA guideline, while 45.5% of demonstrated Scan(+) Tg(+), 27.3% of patients demonstrated Scan(-) Tg(-); in the intermediate group, the figures were 2.3% and 90.0% while in the low risk group, they were 0.6% and 96.4%. In 9 of 11 patients with metastases (81.8%), stimulated serum Tg level at the time of radioiodine ablation therapy was over 10, however in 1 patient (9.1%) it was

WOS: 000344087600025, PubMed ID: 24366641, Hypopituitarism in adult life is commonly acquired and the main causes are known as pituitary tumors and/or their treatments. Since there are new insights into the etiology of hypopituitarism and presence of differences in various populations, more studies regarding causes of hypopituitarism are needed to be done in different ethnic groups with sufficient number of patients. Therefore, we performed a multi-center database study in Turkish population investigating the etiology of hypopituitarism in 773 patients in tertiary care institutions. The study was designed and coordinated by the Pituitary Study Group of SEMT (The Society of Endocrinology and Metabolism of Turkey). Nineteen tertiary reference centers (14 university hospitals and 5 training hospitals) from the different regions of Turkey participated in the study. It is a cross-sectional database study, and the data were recorded for 18 months. We mainly classified the causes of hypopituitarism as pituitary tumors (due to direct effects of the pituitary tumors and/or their treatments), extra-pituitary tumors and non-tumoral causes. Mean age of 773 patients (49.8 % male, 50.2 % female) was 43.9 +/- 16.1 years (range 16-84 years). The most common etiology of pituitary dysfunction was due to non-tumoral causes (49.2 %) among all patients. However, when we analyze the causes according to gender, the most common etiology in males was pituitary tumors, but the most common etiology in females was non-tumoral causes. According to the subgroup analysis of the causes of hypopituitarism in all patients, the most common four causes of hypopituitarism which have frequencies over 10 % were as follows: nonsecretory pituitary adenomas, Sheehan's syndrome, lactotroph adenomas and idiopathic. With regard to the type of hormonal deficiencies; FSH/LH deficiency was the most common hormonal deficit (84.9 % of the patients). In 33.8 % of the patients, 4 anterior pituitary hormone deficiencies (FSH/LH, ACTH, TSH, and GH) were present. Among all patients, the most frequent cause of hypopituitarism was non-secretory pituitary adenomas. However, in female patients, present study clearly demonstrates that Sheehan's syndromeis still one of the most important causes of hypopituitarism in Turkish population. Further, population-based prospective studies need to be done to understand the prevalence and incidence of the causes of hypopituitarism in different countries.

WOS: 000347403300235, PubMed ID: 24643689, Context: It has been shown that miRNA 221, 222 and 146b are increasingly expressed while p27(Kip1) is suppressed in papillary thyroid cancer (PTC). Objective: We investigated the association between the disease recurrence risk and the expression of miRNA 221, 222, 146b and p27(Kip1) protein mRNA in these tumors. We also measured the changes in miRNAs in the presence of Hashimoto's thyroiditis (HT). Methods: We examined formalin fixed tissue samples obtained from 77 patients. 11 out of 77 samples were identified as well differentiated tumor with uncertain malignant potential (WDT-UMP), 46 were PTC and 20 were normal thyroid tissue. Results: Data analysis revealed that the higher risk of recurrence was associated with the higher miRNA expression levels in thyroid cancers. Higher expression levels of miRNA 146b, 221 and 222 were detected in thyroid cancer patients presenting with capsule invasion, vascular invasion or lymph node metastasis, when compared to the patients lacking these features. Furthermore miRNA expression levels were found to be significantly elevated in patients with distant metastases. A negative correlation was found between the p27(Kip1) protein mRNA level and the expression levels of miRNA 221, 222 and 146b. While the expression levels of miRNA 221, 222 and 146b were found to be higher in the cases of WDT-UMP comparing to normal thyroid tissue, the p27Kip1 protein mRNA expression level was lower. No difference was found between the patients with HT and without HT regarding miRNAs expression levels. Conclusions: The expression levels of miRNA 221, 222 and 146b were found to be increased in cases of thyroid cancer with a high risk of recurrence. It is important to understand that these molecular changes such as miRNA expression may eventually be used to predict risk of recurrence.

WOS: 000337910800015, PubMed ID: 24693853, Introduction: The number of studies concerning bone mineral density (BMD) in patients with Sheehan's syndrome (SS) are scarce. We aimed to investigate the relationship between BMD and deficient hormones in patients with newly diagnosed SS. Material and methods: Thirty-four patients with SS and age-gender-weight matched 22 controls were included in the study. Results: We found osteoporosis in 61.8%, osteopenia in 32.3%, and normal dual energy X-ray absorptiometry (DEXA) findings in 5.9% patients. In the control group, 68.2% of individuals were osteopenic and 31.8% of them were normal. The number of osteoporotic patients was found to be higher and BMD values were lower in the patient group compared with the control group. There was no relation of DEXA measurements with the period between the last delivery and the initial diagnosis and the estradiol levels. While there was no relation between insulin-like growth factor 1 (IGF-1) and T and Z scores of femur head, the relation between the IGF-1 and L1-L4 T scores was statistically significant. There was a significant relation between the IGF-1 and L1-L4 Z scores. Conclusions: SS patients should also be assessed in terms of osteoporosis at the time of diagnosis and then proper treatment should be initiated afterwards.

WOS: 000322171400012, PubMed ID: 22994845, Platelet abnormalities in diabetes mellitus (DM) and atrial fibrillation (AF) may underline the etiology of a prothrombotic state in these conditions. Increased mean platelet volume (MPV) is a marker of abnormal platelet function and activation. We aimed to investigate the possible association of chronic AF with MPV in patients who have type 2 DM. Patients who had type 2 DM with either chronic (>= 6 months) AF or normal sinus rhythm (NSR) were included in the study. A total of 162 patients (aged 38-89 years) were divided into 2 groups according to the presence of either AF or NSR. Group 1 consisted of 81 diabetic patients with AF, and group 2 consisted of 81 diabetic patients with NSR. The two groups were not significantly different in terms of age, and gender, as well as in hypertension, smoking, history of coronary artery disease, previous cerebrovascular accidents, microalbuminuria, retinopathy, duration of DM, body mass index, hemoglobin A(1c), total cholesterol, low-density lipoprotein cholesterol, high-density lipoprotein cholesterol, and triglyceride (p > 0.05 for all variables). Although no significant difference was present between groups concerning platelet count; for patients with AF, MPV was higher compared with patients with NSR (9.0 +/- 0.2 fl vs. 8.4 +/- 0.2 fl; p = 0.001). Furthermore, no significant difference was noted between groups regarding routine medications received by patients. In multivariate logistic regression analysis, MPV was the only variable independently related to AF (OR = 2.659; 95% CI, 1.286-5.498; p = 0.008). Consequently, it is concluded that AF is associated with increased MPV in patients with type 2 DM, suggesting the presence of tentatively related processes leading to reciprocal interaction.

WOS: 000308686600002, PubMed ID: 22911280, Objective: The rate of reduction of nocturnal blood pressure (NBP) is lesser than normal in patients with type 2 diabetes mellitus (type 2 DM). Hyperhomocysteinemia (HHC) disrupts vascular structure and function, no matter the underlying causes. The risk of development of vascular disease is greater in diabetic patients with hyperhomocysteinemia than in patients with normal homocystein levels. The aim of the study was to investigate whether there are differences of homocystein levels in dipper and non-dippers patients with type 2 DM. Subjects and methods: We compared 50 patients (33 females, 17 males) with type 2 DM and 35 healthy individuals (18 females, 17 males 1 in a control group. Ambulatory blood pressure monitoring (ABPM) was performed and homocysteine levels were measured in all patients. Results: We found that the percentage of non-dipper pattern was 72% in patients with type 2 DM and 57% in control group. In diabetic and control individuals, homocystein levels were higher in non-dipper (respectively 13.4 +/- 8.1 mu mol/L and 11.8 +/- 5 mu mol/L) than in dipper subjects (respectively, 11.8 +/- 5.8 mu mol/L and 10.1 +/- 4.2 mu mol/L), but there was no significant difference between the two groups (respectively, p = 0.545, p = 0.294). Conclusion: In both groups, homocystein levels were higher in non-dipper than in dipper participants, but there was no significant difference between the groups. High homocystein levels and the non-dipper pattern increases cardiovascular risk. Therefore, the relationship between nocturnal blood pressure changes and homocystein levels should be investigated in a larger study. Arq Bras Endocrinol Metab 2012;56(5):285-90

WOS: 000287018600011, PubMed ID: 21220248, Objective: The nocturnal blood pressure (NBP) reduction is less than normal in the patients with type 2 diabetes mellitus (type 2 DM). L-carnitine deficiency may cause changes of NBP by leading to hyperglycemia, insulin resistance and endothelial dysfunction in patients with type-2 DM. The purpose of the study was to investigate whether there is a difference in levels of L-carnitine in dipper and nondippers patients with type 2 DM. Methods: This is a cross-sectional observational cohort study. We compared the 50 (33 females, 17 males) patients with type 2 DM and the 35 healthy persons (18 females, 17 males) as a control group. In all cases, ambulatory blood pressure monitoring (ABPM) was performed and L-carnitine was measured. The independent samples t test, Chi-square test, Mann-Whitney U test and Pearson correlation analysis were used in the statistical evaluation of data. Results: We found that the percentage of nondipper pattern was 72% in patients with type 2 DM. L-carnitine levels were lower in patients with type 2 DM (52.77+/-12.34 mu mol/L) than those of control group (79.18+/-10.59 mu mol/L), and these differences were statistically significant (p