Browsing by Author "Sonmez, Gulcin Miyase"

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Clinical Features and Responses To Eculizumab of Paroxysmal Nocturnal Hemoglobinuria Patients: a Single-Center Experience
(2019) Sonmez, Gulcin Miyase; Demir, Cengiz; Demircioğlu, Sinan; Ekinci, Omer
Paroxysmal nocturnal hemoglobinuria (PNH) is an acquired clonal hematopoietic stem cell disease classically characterized by chronic intravascular hemolysis, bone marrow failure, and thrombosis. Eculizumab is an anti-C5 monoclonal antibody proven to reduce hemolysis and thrombotic attacks in the treatment of PNH. We aimed to present our data on PNH, a rare disease, and to share our experiences treating PNH with eculizumab. Demographic data, clinical features, history of thrombosis, responses to eculizumab treatment, and survival rates of 9 patients diagnosed with PNH at our hematology center were retrospectively analyzed. The median follow-up period was 46 months (range: 25-62). Five of the patients were female (55.5%), and 4 were male (44.5%), with a median age of 33.5±12.3 years. The mean hemoglobin level was 8.2 g/dL (5.7–10.1 g/dL), mean leukocyte count was 5.80x103/μL (1.72x103/μL–8.30x103/μL), mean platelet count was 96.6x103/L (42x103/μL–214x103/μL), mean lactate dehydrogenase level was 1312 U/L (423–2690 U/L), and mean reticulocyte level was 3.76% (1.1–6.3%). In our study, all cases received eculizumab therapy, of which 8 exhibited full or partial responses, while one was unresponsive to treatment. All patients were alive after the follow-up period. In 8 of the nine patients treated with eculizumab, hemolysis decreased following treatment and blood transfusion was not necessary. The quality of life experienced by all patients was improved. Following determination of the pathogenesis of the PNH, besides the classical treatment methods, eculizumab is a popular treatment option.
Evaluation of Coagulation Parameters in Patients With Parathyroid Adenoma
(Nature Portfolio, 2020) Alay, Murat; Ercek, Berrak Mermit; Sonmez, Gulcin Miyase; Sakin, Aysegul; Ucler, Rifki; Yildiz, Saliha
Parathyroid adenoma is responsible for 80-85% of cases of primary hyperparathyroidism. Increased fibrinogen levels in patients with adenoma may increase the risk of atherosclerosis and cardiovascular events. The aim of this study was to investigate the relationship between coagulation parameters and parathyroid adenoma. A prospective study included 28 female patients with parathyroid adenoma aged 40-88 years and 27 age-matched healthy controls. The coagulation parameters were assessed for each participant. The mean ages of the patient and control groups were 57.7 +/- 10.9 and 53.3 +/- 9.31 years, respectively. The mean level of protein S activity was 65.79 +/- 13.78 in the patient group and 77.00 +/- 15.72 in the control group, and the difference was statistically significant (p = 0.013). The mean fibrinogen levels of the patient and control groups were 338.78 +/- 63.87 mg/dL and 304.30 +/- 45.67 mg/dL, respectively, and a significant difference was found (p = 0.041). However, no significant difference was evident between the two groups with regard to the D-dimer (p = 0.238), aPTT (p = 0.645), INR (p = 0.406), protein C (p = 0.076), and AT-III (p = 0.180) levels. A positive correlation was observed between adenoma volume and fibrinogen in the patient group (r = 0.711, p = 0.001). The protein S levels were lower and the fibrinogen levels higher in the patients with parathyroid adenoma.