Publications by authors named "Ozen Oz Gul"

Purpose: This study aimed to determine the effect of adrenal mass functionality and different hormone subtypes synthesized by the adrenal masses on laparoscopic adrenalectomy (LA) outcomes.

Materials And Methods: The study included 298 patients, 154 of whom were diagnosed with nonfunctional masses. In the functional group, 33, 62, and 59 patients had Conn syndrome, Cushing's syndrome, and pheochromocytoma, respectively.

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Background And Aims: Congenital adrenal hyperplasia (CAH) is a group of disorders that affect the production of steroids in the adrenal gland and are inherited in an autosomal recessive pattern. The clinical and biochemical manifestations of the disorder are diverse, ranging from varying degrees of anomalies of the external genitalia to life-threatening adrenal insufficiency. This multicenter study aimed to determine the demographics, biochemical, clinical, and genetic characteristics besides the current status of adult patients with CAH nationwide.

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Article Synopsis
  • - This study aimed to identify factors affecting disease-free survival (DFS) in patients with medullary thyroid carcinoma (MTC), as previous research in this area has been limited.
  • - Researchers analyzed data from 257 patients, finding that 51% had persistent/recurrent disease while 49% had no evidence of disease at follow-up, with various factors like age, metastasis, and initial response influencing DFS outcomes.
  • - The key finding was that the lack of an excellent response after initial treatment is the strongest predictor of worse DFS, highlighting the need for diligent follow-up even in patients who initially respond well.
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Background Thyroid cancer is one of the five most common cancers causing bone metastasis. If there is an increase in serum thyroglobulin-antithyroglobulin levels in differentiated thyroid cancer or calcitonin levels in medullary thyroid cancer, patients should be evaluated for recurrence and distant metastasis. The skeleton is the second most common site of distant metastasis in thyroid cancer after the lung.

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Celiac disease (CD) accompanying autoimmune endocrine diseases (AED) is generally asymptomatic. This study aimed to evaluate the frequency of clinically overt or silent CD in patients diagnosed with autoimmune endocrinopathy and the clinical effects of silent CD in these endocrinopathies. The study included 166 patients with known or newly diagnosed mono-/polyglandular AED and 90 age- and gender-matched healthy controls.

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Medullary thyroid carcinoma (MTC) and papillary thyroid carcinoma (PTC) are two different types of thyroid carcinoma. They have different features in terms of cellular origin, histopathology, clinical features, prevalence, and prognosis. PTC originates from follicular cells, while MTC from parafollicular cells.

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Objectives: Central venous sampling (CVS) with corticotropin-releasing hormone (CRH) stimulation is a crucial technique in evaluating adrenocorticotropic hormone (ACTH)-dependent Cushing's syndrome (CS). We evaluated central venous sampling (CVS) and magnetic resonance imaging (MRI) findings in predicting the localization and lateralization of pituitary microadenomas.

Methods: We analyzed 29 patients with CS who underwent CVS with CRH stimulation and examined with MRI retrospectively.

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Background: Global COVID-19 outbreak has been such a stressful experience for most of the people. Using a web-based cross-sectional study, we aimed to evaluate the acute stress response, depression, and anxiety in patients with diabetes mellitus (DM) during the COVID-19 pandemic, and to examine the effect of these psychiatric problems on diet habits and glycemic controls of patients.

Methods: This web-based survey of COVID-19 was sent to the patients through the Whatsapp platform.

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Purpose: Giant prolactinomas, which have extremely large sizes and high prolactin (PRL) values, are rarely seen. Although medical therapy is effective, surgical treatment is more frequently applied due to slightly lower response rates and compression symptoms. This study aimed to compare the medical and surgical treatment results in giant prolactinomas.

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Recently, studies have reported that inflammatory response and elevated platelet counts are associated with several cancers. In the present study, we aimed to evaluate hemocytometer parameters in differentiating adrenal adenoma and carcinoma, and the prognostic utility of hemocytometer parameters in adrenocortical carcinoma (ACC). We included 30 patients with nonfunctional adrenal adenoma and 13 patients with ACC having undergone surgery between 2005 and 2017 and followed up postoperatively at our centre.

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Objectives: The study aimed to assess the haemodynamic changes of laparoscopic adrenalectomy (LA) in geriatric patients with pheochromocytoma (PHEO). To the best of our knowledge, this is the first study to evaluate the haemodynamic outcomes of LA in this patient population.

Methods: Data of 350 patients who underwent single-side transperitoneal LA between 2000 and 2020 were reviewed retrospectively.

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Parathyroid carcinoma is a rare cause of hyperparathyroidism and leads to severe hypercalcemia. The etiology is not fully known. Parathyroid cancer should be considered in the differential diagnosis, if serum calcium and parathyroid hormone levels increase, and parathyroid gland is palpable.

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Background: Homozygous familial hypercholesterolemia (HoFH) is a rare, life-threatening disease due to high serum low-density lipoprotein (LDL) cholesterol levels. LDL cholesterol-lowering interventions are fundamental for patients with HoFH.

Objective: It was aimed to investigate the association between the mental status of patients with HoFH and healthy lifestyle behaviors.

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Aim: To present an insulinoma case with post-prandial hypoglycemic symptoms associated with glucose inducible endogenous hyperinsulinemia.

Case: A 52-year-old female patient was evaluated for hypoglycemic symptoms especially those occuring within 3 hours after consuming sugary foods. These symptoms were persistent for a year and a half.

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Introduction: Dapagliflozin is a sodium-glucose cotransporter 2 inhibitor that improves glycemic control in patients with type II diabetes mellitus which increasing urinary glucose excretion. With numerous controlled experimental studies of dapagliflozin, evaluation of real-life data after entry into clinical practice is an important condition. In our study, the effects of dapagliflozin (10 mg) on lipid profile were investigated retrospectively.

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Purpose: Acromegaly causes multiple comorbidities, including gastrointestinal disorders. The present study evaluated the frequency of hiatal hernia and other upper gastrointestinal pathologies in patients with acromegaly, given that visceromegaly and reduced nitric oxide levels in acromegaly may impact diaphragm and lower esophageal sphincter function and thus possibly the development of hiatal hernia.

Methods: Thirty-nine acromegaly patients followed our center for the previous 6months were recruited.

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Background: Homozygous familial hypercholesterolemia (HoFH) is a rare, life-threatening inherited disease leading to early-onset atherosclerosis and associated morbidity. Because of its rarity, longitudinal data on the management of HoFH in the real world are lacking, particularly on the impact the condition has on quality of life (QoL), including the impact of the extracorporeal lipid removal procedure apheresis (LA).

Methods: The A-HIT1 study included 88 patients with HoFH aged ≥12 years receiving regular LA in 19 centers in Turkey.

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Introduction: Dapagliflozin is an antidiabetic drug that has been used as a member of the new antidiabetic drug group that acts by inhibiting SGLT-2 and increasing urinary glucose excretion. With numerous controlled experimental studies of dapagliflozin, evaluation of real-life data after entry into clinical practice is an important condition. In our study, the effects of dapagliflozin on glycemic control and anthropometric measurements were investigated retrospectively.

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Objectives: Persistent hyperparathyroidism can have a deleterious effect on graft function in kidney transplant recipients, although serum calcium, phosphorus, and parathyroid hormone levels tend to normalize after successful transplant. Parathyroidectomy can result in sustained amelioration of persistent hyperparathyroidism despite graft failure risk and unfavorable graft outcomes. Data on this issue are limited and conflicting.

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Background And Aims: Familial hypercholesterolemia (FH) is a common genetic disease of high-level cholesterol leading to premature atherosclerosis. One of the key aspects to overcome FH burden is the generation of large-scale reliable data in terms of registries. This manuscript underlines the important results of nation-wide Turkish FH registries (A-HIT1 and A-HIT2).

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Background And Aims: Homozygous familial hypercholesterolemia (HoFH) is a genetic condition characterized by lethally high levels of low-density lipoprotein cholesterol (LDL-C) from birth, and requires rapid and aggressive intervention to prevent death due to coronary heart disease and/or atherosclerosis. Where available, lipoprotein apheresis (LA) is the mainstay of treatment to promote survival.

Methods: A-HIT1 registry was conducted with the aim of providing insight to the real-life management of HoFH patients undergoing LA in Turkey, where LA procedures are fully reimbursed and widely available.

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Objective: Adrenocortical carcinoma is an aggressive endocrine malignancy with an annual incidence of 0.5-2 cases per million. The most important factors that determine prognosis are tumor stage at the time of diagnosis and the success of surgery.

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Eighty-four subjects, premenopausal female patients (n = 42, mean (SD) age: 26.4 (4.2) years) diagnosed with polycystic ovary syndrome (PCOS) and age-matched healthy volunteers (n = 42, mean (SD) age: 27.

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Summary: Langerhans cell histiocytosis (LCH) is a rare sporadic disease characterized by histiocytic neoplastic infiltration of various organ systems and a wide spectrum of clinical manifestations, ranging from benign and self-limiting to lethal. Herein, we report a rare case of adult-onset multi-systemic LCH in a 36-year-old male patient with an initial perianal presentation and incidental finding of subsequent thyroid gland involvement in the follow-up period. The patient with a history of perianal LCH treated with surgical excision and local radiotherapy was referred to our Endocrinology Department upon detection of hypermetabolic nodular lesions in the left lateral lobe of thyroid gland on positron emission tomography-computed tomography (PET/CT) scan in the nineth month of follow-up.

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