Semir Pasa

Yuzuncu Yil University , Thospia, Van, Turkey

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Publications (45)72.95 Total impact

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    ABSTRACT: Carotid artery intima-media thickness (CIMT), hyperhomocysteinemia, microalbuminuria, and nitric oxide reflect subclinical atherosclerosis and predict the risk of future cardiovascular events. We aimed to evaluate the presence of subclinical atherosclerosis and endothelial dysfunction in normotensive patients with gestational diabetes mellitus (GDM) noninvasively. We enrolled 41 normotensive patients with GDM and 44 healthy gravidae in the study. Serum homocysteine and nitric oxide levels, urinary albumin excretion (microalbuminuria), and CIMT were evaluated along with lipid parameters and anthropometric measurements. Patients with GDM had significantly higher levels of serum homocysteine, urinary albumin excretion, and increased CIMT (p < 0.001, p=0.005, and p < 0.001, respectively). Nitric oxide levels were significantly reduced in the patient group (p < 0.001). There was a significant difference between groups in terms of low-density lipoprotein (LDL) but not of high-density lipoprotein (HDL) and triglyceride levels. A significant correlation was observed between CIMT and serum LDL, HDL, homocysteine, nitric oxide levels, and urinary albumin excretion. Microalbuminuria was significantly correlated with serum homocysteine levels (p=0.03) but not with nitric oxide. Independent of elevated blood pressure, subclinical atherosclerosis and endothelial dysfunction exist in normotensive patients with GDM. Further studies with a large number of participants are required to clarify these data.
    Full-text · Article · Jul 2013 · Herz
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    ABSTRACT: Hemangiomas are benign vascular tumors that usually involve the liver, skin, eyes and central nervous system. Hemangioma of the bone is unusual and is generally observed in the vertebrae or skull while hemangioma of the costae is extremely rare. Hemangioma of the rib and chest wall tuberculosis may be misdiagnosed as chest wall tumors. We herein report a case of hemangioma of the rib with a tuberculosis infection of the pleura.
    No preview · Article · Jun 2013 · Internal Medicine
  • A.E. Atay · H. Akbas · N. Sakar · S. Pasa · S. Ari · N. Ekin
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    ABSTRACT: Tuberous sclerosis complex (TSC) is an autosomal dominant syndrome or in sporadic form characterized by hamartamatous lesions in multiple organs. It affects several sites such as skin, kidney, lung, heart, central nervous system and liver in diferent stages of disease. TSC is caused by mutations on either chromosome 9 (9q34, the TSC1 gene) or chromosome 16 (16p13, TSC2 gene). TSC1 and TSC2 genes encode proteins called tuberin and hamartin; respectively. Although the pathogenetic mechanism is exactly unknown, a possible mechanism is a GTPase-activating protein against Rheb (Ras homolog enriched in brain), which regulates mTOR (mammalian target of rapamycin) signaling. The mammalian target of rapamycin (mTOR), is a serine-threonine kinase that increases cell proliferation and growth. We aimed to review the clinical manifestations and their predictive role on the course of disease.
    No preview · Article · Apr 2013
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    A E Atay · G Seven · K Yalcin · S Pasa · H Degertekin
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    ABSTRACT: To evaluate patients with chronic hepatitis B virus (HBV) infection and low-level viraemia in terms of determining HBV DNA cut-off values and levels of alanine aminotransferase (ALT) and other possible markers for discriminating between chronic hepatitis B e-antigen (HBeAg)-negative patients and hepatitis B surface antigen (HBsAg) inactive carriers. HBV-infected patients who were HBeAg-negative with undetectable HBV DNA by standard hybridization assay and high (HBeAg-negative group, n = 81) or normal (HBsAg inactive carrier group, n = 77) ALT levels were enrolled. Quantitative polymerase chain reaction assay using a COBAS Amplicor HBV monitor test was performed to detect low HBV DNA levels. The HBV DNA level was found to be significantly higher in the HBeAg-negative chronic HBV group (mean ± SD 94 477 ± 167 528 copies/ml) compared with the HBsAg inactive carrier group (mean ± SD 19 215 ± 57 970 copies/ml). A low level of viral replication may persist in chronic HBV-infected patients who are HBeAg-negative, and the level of HBV DNA was higher in the HBeAg-negative group than in the inactive HBsAg carrier group. Necroinflammation also persisted in the HBeAg-negative group and these patients had a higher level of ALT than the inactive HBsAg carriers.
    Full-text · Article · Oct 2012 · The Journal of international medical research
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    B Demir · S Demir · S Pasa · S Guven · Y Atamer · A Atamer · Y Kocyigit
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    ABSTRACT: Nitric oxide (NO) contributes to vasodilatation that is observed during normal pregnancy. Hyperhomocysteinaemia (HHcy) is a vascular risk factor associated with placental microvascular diseases and pre-eclampsia. Asymmetric dimethylarginine (ADMA), an endogenous inhibitor of endothelial nitric oxide synthase (NOS) has been linked to endothelial dysfunction. Maternal ADMA has been reported to be higher in women with pre-eclampsia and HHcy leads to accumulation of ADMA. The aim of this presented study is to evaluate the alterations of plasma homocysteine, ADMA and NO levels in mild pre-eclampsia. A total of 40 pre-eclamptic women and 40 healthy controls were included into the study. Mean systolic and diastolic blood pressure, mean serum homocysteine and ADMA levels were significantly higher and NO level was lower in patients. Serum homocysteine, ADMA and NO levels found to be correlated among them and with blood pressure. In conclusion, we found that homocysteine and ADMA levels were increased and NO levels decreased in pre-eclampsia.
    Full-text · Article · Aug 2012 · Journal of Obstetrics and Gynaecology
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    ABSTRACT: Tuberous sclerosis complex (TSC) is an autosomal dominant disorder characterized by hamartomatous involvement of multiple organs such as the skin, central nervous system, kidneys, lungs, and heart. A linkage has been found with a locus on the long arm of chromosome 9 (9q34) and with a locus on the short arm of chromosome 16 (16p13). TSC has a birth incidence of 1/6000. Children with TSC are almost universally born with normal kidneys, but cystic disease and angiomyolipomas develop with increasing age. Angiomyolipomas, renal cysts, and renal cell carcinoma are classical features of renal involvement in TSC. Renal complications are the most common cause of death in adult TSC patients, thus renal involvement has a crucial importance on the course of this disease. We present a 27-year-old patient previously diagnosed as tuberous sclerosis complex and referred with acute renal failure and polycystic kidney disease.
    No preview · Article · Jun 2012 · Archives of Iranian medicine
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    B Demir · S Pasa · S Demir · C Tumer · A E Atay · T Gul · Y Atamer
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    ABSTRACT: This study investigated the severity of hirsutism and its correlation with serum total testosterone (tT) levels in 87 patients with polycystic ovary syndrome (PCOS) and 85 healthy control subjects from the south-eastern region of Turkey. A wide range of variability exists in both hirsutism and modified Ferriman-Gallwey (mFG) scores. Similar mFG scores and serum tT levels were found compared with previous studies of general populations, but lower scores than those previously reported from Turkey. The incidence of hirsutism was lower in hyperandrogenic PCOS patients compared with non-hyperandrogenic PCOS patients. There was no correlation between serum tT levels and the rate of hirsutism in patients with PCOS. Heritability, testosterone receptor sensitivity, 5α reductase activity or environmental/socioeconomic factors may play a role in the development of clinical hirsutism. Larger scale studies are needed to clarify which other factors may be responsible and to confirm these results.
    Full-text · Article · Aug 2011 · The Journal of international medical research
  • B Demir · S Pasa · S Demir · R Buyukkaya · A E Atay · Y Atamer · T Gul
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    ABSTRACT: We aimed to investigate morphologic and functional alterations of common carotid arteries (CCA) and femoral arteries and the anteroposterior diameter of the abdominal aorta in patients with polycystic ovary syndrome (PCOS). Fifty consecutive females with the complaint of oligoamenorrhea, infertility or hirsutismus, diagnosed with PCOS and 50 healthy females admitted to the Department of Gynecology and Obstetrics, Ergani State Hospital between January 2010 and January 2011 were included in the study. The mean BMI of 50 patients with PCOS was higher than control subjects (CS) (25.89 +/- 3.3 vs 22.52 +/- 2.7 kg/m2, p < 0.0001). The mean arterial blood pressure was 88.93 +/- 6.4 mmHg in the patient group and was it 85.73 +/- 7.6 mmHg in CS (p = 0.02). The mean plasma glucose level (74.04 +/- 6.7 vs 70.5 +/- 6.4 mg/dl), total cholesterol level (167.88 +/- 30.1 vs 153.38 +/- 27.8 mg/dl), low density lipoprotein level (101.28 +/- 27.0 vs 79.56 +/- 25.5 mg/dl) and triglyceride level (121.22 +/- 49.2 vs 102.54 +/- 36.6 mg/dl) were higher; also the mean high density lipoprotein level (44.56 +/- 8.1 vs 50.90 +/- 12.3 mg/dl) was lower in patients with PCOS than CS (p = 0.009, p = 0.014, p < 0.0001, p = 0.034 and p = 0.003, respectively). CCA-IMT (0.63 +/- 0.2 vs 0.52 +/- 0.1 mm), and CCA-PI (1.44 +/- 0.3 vs 1.28 +/- 0.22) were higher in patients with PCOS (p = 0.018 andp = 0.005, respectively). Femoral-IMT (0.62 +/- 0.6 vs 0.41 +/- 0.1 mm) and anteroposterior diameter of the infrarenal aorta (12.34 +/- 1.5 vs 11.4 +/- 1.0 mm) were higher in patients with PCOS (p = 0.024 and p = 0.001, respectively). The present study showed that IMT and PI of CCA, and anteroposterior diameter of the infrarenal abdominal aorta and femoral-IMT were higher in patients with PCOS. These results are probably related with increased androgens, their effects on insulin resistance and lipid profile, increased BMI and blood pressure. Detection of these functional and/or structural abnormalities are important in predicting prognosis. Larger scale prospective studies are needed to determine the effects of PCOS on the mortality and morbidity, and to clarify the relation between the duration of the disease and development of these alterations.
    No preview · Article · Jan 2011 · Clinical and experimental obstetrics & gynecology
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    ABSTRACT: Classical myelofibrosis syndromes (MPS) most frequently occur in adults, but MPS unique to childhood also exist. Such syndromes include juvenile chronic myelomonocytic leukemia (JMML), the MPS of monosomy 7 in childhood, familial chronic myeloid leukemia (CML), the transient MPS of infants with trisomy 21, and childhood forms of myelofibrosis. Neurofibromatosis type 1 (NF1) is an autosomal dominant genetic disorder with pigmentary abnormalities and are predisposed to benign and malignant neoplasms, mostly in children. MPSs were disproportionately common among children with NF1. Herein we reported a case of polycythemia vera (PV) accompanied to NF1 in an adult patient. The co-existance of NF1 and childhood MPS is a well known condition. The same relation was not demonstrated in adulthood NF1 patients according to our screening of the literature. Most of the reported cases were define a relation with JMML and monosomy 7 syndrome. Probably this is the first case of PV, a type of classic adult MPS accompanied to NF1.
    No preview · Article · Mar 2010 · UHOD - Uluslararasi Hematoloji-Onkoloji Dergisi
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    ABSTRACT: Increased mortality due to atherosclerotic cardiovascular disease has been described in adult patients with hypopituitarism, although the precise underlying mechanisms remain undetermined. Various abnormalities of coagulation and fibrinolysis occur in patients with thyroid diseases. Conversely, there are conflicting reports concerning the effects of growth hormone replacement on coagulation and fibrinolytic pathways in hypopituitary adults, and there is no existing data on the effects of hypocortisolism on thrombotic and fibrinolytic systems. The same controversial data were also obtained in studies which evaluate the effects of estrogen replacement therapy on cardiovascular events in post-menopausal women. The aim of this study was to investigate the effects of Sheehan's syndrome (SS), which is a common cause of ypopituitarism, on haemostatic actors and to assess the effects of L-thyroxin, prednisolone and conjugated estrogen / medroxyprogesterone acetate replacement on these factors. Prothrombin time (PT), activated thromboplastin time (aPTT), fibrinogen and D-dimer levels, and von-Willebrand factor (vWF) activity were compared among 32 patients with SS and 35 control subjects (CS) with similar age. A shorter PT and aPTT, higher fibrinogen and d-dimer levels, and similar vWF activity were determined in patients with SS as compared with CS. In addition, it was determined that hormone replacement treatment did not have a significant effect on coagulation parameters except the fibrinogen and d-dimer levels.
    No preview · Article · Jan 2010 · UHOD - Uluslararasi Hematoloji-Onkoloji Dergisi
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    ABSTRACT: Thrombotic thrombocytopenic purpura (TTP) is a severe microvascular occlusive thrombotic microangiopathy characterized by systemic platelet aggregation, organ ischemia, profound thrombocytopenia, and fragmentation of erythrocytes. Unexplained occurrence of thrombocytopenia and anemia should prompt immediate consideration of the diagnosis and evaluation of peripheral blood smear for evidence microangiopathic hemolytic anemia. Excellent remission and survival rates were achieved by therapeutic plasma exchange. We reviewed characteristics and response rates to plasmapheresis of our TTP patients. A total of 25 cases were diagnosed. The parameters of hemoglobin and platelet were analyzed at presentation, as well as the number of plasmapheresis sessions and adjunctive treatment given. We found a response rate of 80 percent to plasma exchange. Response was better in 23 patients who presented with idiopathic TTP. Response was poor in patients with TTP secondary to underlying metastatic carcinoma. Two patients relapsed and one of the relapsed patients died. Plasmapheresis is mandatory and effective for primary TTP. Plasmapheresis may not be effective in all instances, especially if TTP is secondary to underlying disseminated cancer.
    No preview · Article · Jan 2010
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    ABSTRACT: Celiac disease is an abnormal T cell-mediated immune response against dietary gluten in genetically predisposed individuals. The aim of our prospective study was to evaluate the frequency of Celiac disease in patients with lymphoma and to determine the usefulness of the anti-gliadin and anti-endomysial antibodies (EMA) for diagnosis of Celiac disease in this patient group. We studied 119 patients with previously or newly diagnosed non-Hodgkin's lymphoma and 60 patients with Hodgkin's lymphoma who presented at the hematology and medical oncology divisions of Dicle University Hospital in Turkey between December 2002 and January 2006. Serological screening for Celiac disease was performed in all patients by searching for serum anti-gliadin immunoglobulin A and immunoglobulin G, and EMA immunoglobulin A and immunoglobulin G. In the Hodgkin's lymphoma group, anti-gliadin immunoglobulin A was detected in 9 (15%) patients (3 male, 6 female), and antigliadin immunoglobulin G was detected in 21 (35%) patients (15 male, 6 female). In the non-Hodgkin's lymphoma group, antigliadin immunoglobulin A was detected in 6 (5%) patients (2 M male 4 female), and anti-gliadin immunoglobulin G was detected in 30 (25.2%) patients (18 male, 12 female). EMA immunoglobulin A and immunoglobulin G were not detected in the Hodgkin's lymphoma and non-Hodgkin's lymphoma groups. Our report is the first to describe the frequency of Celiac disease in patients with lymphoma in the southeast region of Turkey. In our study, there was no evidence that Celiac disease is a pre-malignant condition for lymphoma. Serological screening for Celiac disease in lymphoma patients does not seem to be necessary.
    No preview · Article · Jul 2009 · The Turkish journal of gastroenterology: the official journal of Turkish Society of Gastroenterology
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    ABSTRACT: Acute leukemia in pregnancy offers a unique management dilemma in the absence of clear guidelines. There is some transporters localized into the placental trophoblasts plays an important role in limiting the passage of substrate drug. Herein, we reported a case of fetal loss in a pregnant patient in 34 gestational weeks, with acute myeloblastic leukemia who treated with high dose cytarabine plus fludarabine chemotherapy, to discuss the effects of cytotoxic agent on fetus. There were many reports about pregnancies complicated with AML treated with standart dose cytosine arabinoside and antracyclin combination. We suggest that high dose chemotherapy, mainly FLAG-IDA regime may cause fetal death, although in nearby term periods. Understanding the role of drug transporters in moderating transplacental passage of substrates has important clinical implications for choosing specific drugs to achieve therapeutic objectives.
    Preview · Article · Jun 2009 · UHOD - Uluslararasi Hematoloji-Onkoloji Dergisi

  • No preview · Article · Jan 2009

  • No preview · Article · Jan 2009 · International journal of dermatology
  • T. Çil · A. Altintaş · S. Paşa · A. Işikdoǧan
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    ABSTRACT: Metastatic tumors of breast are rare and account only for approximately 2% of all malignant breast cancers. Breast metastasis of stomach's signet ring cell carcinoma (SRCC) is also a very rare condition. Herein, we report two rare cases of gastric SRCC metastasis to the breast. First case is a 63-year-old female patient who was admitted to our clinic with swelling in the left breast and arm with enlarged left axillary lymphadenopathy. She was diagnosed with gastric SRCC a year ago. Second case is a 65-year-old woman diagnosed with gastric SRCC who had undergone total gastrectomy two years ago, and had one-year history of operation for kruckenberg's tumor. This patient was admitted to our clinic with two months history of pain and swelling in the left breast. She was also diagnosed as a gastric SRCC metastasis.
    No preview · Article · Jan 2009 · Turkish Journal of Cancer
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    ABSTRACT: Non-Hodgkin's lymphoma is a heterogeneous group of lymphoproliferative disorders with varying patterns of behavior and treatment responses. Advances in understanding of tumor biology have made it possible to exploit novel treatment strategies such as monoclonal antibodies and their conjugation with radioimmunotherapy was recommended in patients with first relapse of low-grade lymphomas such as follicular lymphoma after rituximab containing chemotherapy. Treatment with radioimmunotherapy such as yttrium-90-ibritumomab-tiuxetan utilizes a monoclonal anti-CD20 antibody to deliver beta-emitting yttium-90 to the malignant B-cells. Clinical trials have demonstrated its efficacy, which is largely independent of the intrinsic activity of the anti-CD20 antibody. Relapses of nodal lymphomas usually occur in extra lymphoid areas. Central nervous system (CNS) involvement develops in less than 1% of patients with lymphomas. Herein, we are presenting a rare case of CNS involvement of follicular lymphoma in a patient who has achieved systemic complete remission after yttrium-90-ibritumomab treatment.
    No preview · Article · Dec 2008 · Turkiye Klinikleri Journal of Medical Sciences
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    ABSTRACT: Although its exact mechanism is unclear, anaemia is well recognised as a feature of hypopituitarism; and anaemia is associated with Sheehan's syndrome (SS). We aimed to evaluate the frequency and severity of anaemia and other haematological changes among patients with Sheehan's syndrome, in comparison with healthy controls. Sixty-five SS patients and 55 age-matched female healthy controls were included. Biochemical and hormonal assessments and haematological evaluations were carried out, and groups were compared. The mean number of red blood cells, as well as mean haemoglobin, iron and erythropoietin levels, total iron-binding capacity and transferrin saturation were all significantly lower in SS patients compared to controls. SS patients had significantly higher rates of anaemia (80.0% vs. 25.5%, p = 0.0001), iron deficiency (44.6% vs. 5.4%, p = 0.001), leukopenia (20.0% vs. 5.4%, p = 0.015), thrombocytopenia (9.2% vs. 0.0%, p = 0.028) and bicytopenia (21.5% vs. 1.8%, p = 0.001) compared to controls. Anaemic SS patients had normochromic-normocytic anaemia (55%) or hypochromic-microcytic anaemia (45%). Anaemia is frequently associated with Sheehan's syndrome and responds to appropriate replacement therapy. Hypopituitarism should be considered as a possible cause of anaemia, and a hormone examination should be undertaken promptly, particularly in patients with anaemia resistant to therapy and/or with a history suggestive of Sheehan's syndrome.
    No preview · Article · Oct 2008 · Annals of Hematology
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    ABSTRACT: Nonsteroidal anti-inflammatory drugs (NSAIDs) cause gastrointestinal (GI) damage primarily due to the inhibition of prostaglandin synthesis in gastric mucosa, which is an important factor in mucosa protection. Platelets are a cardinal feature of vascular repair. A variety of angiogenic stimulators are stored in platelets and are released during clotting at the wound. When there is a defect in any of these functions and/or platelet number, haemostasis is usually impaired and there may be an associated increased risk and severity of bleeding. While the mechanism of mucosal injury and bleeding are well documented with the use of NSAIDs, very little is known about the platelet function abnormalities and their effects on severity of upper GI bleedings. We performed a prospective analysis of 49 patients who had a history of NSAIDs use to investigate the association between the platelet function impairment associated with NSAIDs and severity of upper GI haemorrhages. Thirty-six of 49 patients (73.5%) had deteriorated platelet function. Mean severity score of patients with deteriorated platelet functions was 3.39, and that of patients with normal platelet functions was 2.46. Mean severity score was statistically significantly higher in patients with deteriorated platelet functions. In conclusion, impaired platelet functions associated with NSAIDs may cause more severe upper GI bleeding. Clinicians should be alert for GI complications especially in older patients and in those with a history of ulcer bleeding.
    No preview · Article · Sep 2008 · Journal of Thrombosis and Thrombolysis

  • No preview · Article · Aug 2008 · NeuroToxicology

Publication Stats

238 Citations
72.95 Total Impact Points


  • 2013
    • Yuzuncu Yil University
      • Faculty of Medicine
      Thospia, Van, Turkey
  • 2010-2012
    • Adiyaman University
      Carbanum, Adıyaman, Turkey
  • 2004-2010
    • Dicle University
      • • Division of Medical Oncology
      • • Division of Hematology
      • • Department of Internal Medicine
      Amida, Diyarbakır, Turkey