Publications by authors named "Orhan Turken"

To compare the seropositivity rate of cancer patients with noncancer controls after inactive SARS-CoV-2 vaccination and evaluate the factors affecting seropositivity. Spike IgG antibodies against SARS-CoV-2 were measured in blood samples of 776 cancer patients and 715 noncancer volunteers. An IgG level ≥50 AU/ml is accepted as seropositive.

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Aim Of The Study: To investigate the percentage of CD4+CD25(high) cells (including Treg cells) and CD8+CD28- cells in breast cancer patients with and without high levels of autoimmune thyroid antibodies.

Material And Methods: Thirty-five women with breast cancer (9 of them having high thyroid antibodies) and fourteen healthy subjects were enrolled in this study. Flow cytometry was used to count CD4+CD25(high) cells and CD8+CD28- suppressive cells (CD8 cell subtypes).

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Background: Anastrozole, an aromatase inhibitor, is commonly used in the adjuvant treatment of breast cancer. Anastrozole treatment is associated with a risk of thromboembolic events and retinal vascular side effects. Herein, we present a case of hemi-central retinal artery occlusion diagnosed in a breast cancer patient using anastrozole.

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Arterial thromboembolic events are not common after chemotherapy. We present a case of a cerebrovascular accident, which developed after chemotherapy in a patient with a germ cell tumor. A 34-year-old man with a testicular germ cell tumor who did not have any comorbid disease was admitted to hospital.

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Aim: To evaluate the CD8+CD28- and CD4+CD25+ regulatory T (Treg) cells in addition to other some lymphocyte subgroups in peripheral blood of advanced stage lung cancer patients.

Methods: The study group (n = 28) comprised chemotherapy and radiotherapy naïve patients with non-small cell lung cancer (NSCLC) and small cell lung cancer (SCLC). The control group (n = 22) consisted of age- and sex-matched healthy volunteers.

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A 53-year-old male patient was admitted to our hospital with abdominal pain in the right upper quadrant. There was no change in laboratory investigations other than a slight increase in serum levels of alkaline phosphatase (ALP), alanine aminotransferase (ALT), and gamma glutamyl transferase (GGT). Computed tomography (CT) of the abdomen showed multiple hepatic nodular lesions in the liver.

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Myelodysplastic syndrome (MDS) is a clonal disease of the bone marrow characterized by abnormal hematopoiesis and cytopenias. It has been shown that abnormal cytokine production together with apoptosis are major contributors to the cytopenias associated with the disorder. As the interaction of cytokines plays a role in the pathogenesis, suppression of the cytokine production by the administration of the combination of pentoxifylline, ciprofloxacin, and dexamethasone (PCD combination) has resulted in the correction of at least some aspects of the cytopenias in the majority of patients and in complete hematologic remission in a small percentage.

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Anticancer immunotherapy using dendritic cell (DC) based vaccines provides an adjuvant therapeutic strategy that is not cross reactive with conventional therapeutics. However, manufacturing of DC vaccines requires stringent adherence to Good Manufacturing Practice (GMP) methods and rigorous standardization. Optimally this includes a closed system for monocyte isolation, in combination with closed culture and washing systems and an effective vector transduction strategy.

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Gamma-delta T (gammadelta T) cells form a subgroup which has been reported to play a role in both natural and acquired immunity. Their levels have been found to increase in some tumour tissues. The aim of this study was to investigate the ratio of gammadelta T cells to all T cells in the peripheral blood of advanced-stage cancer patients; the level of gammadelta T cells expressing the Vdelta2-T-cell receptor (TCR) chain; NKG2D receptor expression; and apoptotic (Annexin-V) gammadelta T-cell levels.

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The current use of doxorubicin is regarded as an absolute contraindication for hyperbaric oxygen (HBO2) therapy because of the increased risk of cardiotoxicity. The aim of this study was to investigate whether additional exposure to HBO2 during the course of doxorubicin treatment would further increase the cardiotoxicity of doxorubicin in rats. Female Wistar rats were treated with either HBO2 (n = 10) or doxorubicin (n = 8) or a combination of both treatments (n = 10) for 4 consecutive weeks and followed up for an additional 4 weeks.

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Background: Both paclitaxel (P) and carboplatin (C) have significant activity in non-small cell lung cancer (NSCLC). The weekly administration of P is active, dose intense, and has a favorable toxicity profile. We retrospectively reviewed the data of 51 consecutive patients receiving C and day 1 and 8 P chemotherapy (CT) regimen in advanced stage NSCLC to evaluate the efficacy and toxicity.

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Objectives: Burkitt's lymphoma (BL) occurs mostly in children. Isolated bilateral ovarian involvement presenting with amenorrhea is extremely rare in young adults.

Case: A 24-year-old female presented with secondary amenorrhea.

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Background: The relationship between breast cancer and thyroid diseases is controversial. Discrepant results have been reported in the literature. The incidences of autoimmune and nonautoimmune thyroid diseases were investigated in patients with breast cancer and age-matched control individuals without breast or thyroid disease.

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Thrombotic thrombocytopenic purpura is a syndrome characterized by hemolytic anemia, thrombocytopenia, neurological symptoms, fever and renal dysfunction. Although the syndrome is usually associated with various infections, vasculitis and pregnancy, rarely can it be associated with certain neoplasms and drugs such as ticlopidine. A 63-year-old woman, who had undergone coronary angioplasty and had been started on ticlopidine, was admitted to our clinic with a history of vomiting, fatigue, hematuria and deterioration in her cognitive abilities.

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We presented a 64-year-old male patient with T-large granular cell leukemia/lymphoma with an agressive clinical course. Large granular lymphocytes were noted on peripheral blood smear. The phenotyping of the cells was typical T-cell lineage [CD2 (+), CD3 (+), CD5 (+)].

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Typical sites of squamous cell carcinoma of lung metastases include liver, brain, bones, pulmonary and adrenal glands. In advanced dissemination it can rarely involve the skeletal muscle. The patient in this case report was a 46-year-old man, with no significant medical history.

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Amifostine, a phosphorylated thiol-amine, is known as a cytoprotective agent especially for cisplatin containing chemotherapies. Apart from the cytoprotective role, Amifostine could also be used in the treatment of hematologic malignancies such as myelodysplastic syndrome (MDS) and acute myeloblastic leukemia (AML), as a treatment option or for potentiating the effects of cytotoxic agents. We tried to use Amifostine in a patient with AML, which did not respond to conventional cytotoxic chemotherapy and aimed to publish the results.

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