Browsing by Author "Kaya S."

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    Capitonnage results in low postoperative morbidity in the surgical treatment of pulmonary echinococcosis
    (2012) Yaldiz S.; Gursoy S.; Ucvet A.; Yaldiz D.; Kaya S.
    Background: The main surgical techniques in the treatment of pulmonary echinococcosis are cystotomy alone, cystotomy and capitonnage, enucleation, and pericystectomy. Controversy persists regarding the selection of surgical technique. We reviewed our experience to identify the impact of capitonnage on outcomes. Methods: A single-institution retrospective analysis was made of the 308 consecutive patients with thoracic hydatid disease treated surgically during 17 years. Results: The most common presenting symptoms were cough and chest pain. At presentation, 69 patients (22.4%) had complicated hydatid disease, cyst rupture into bronchus in 62 and into pleural cavity in 7. Bilateral involvement occurred in 37 patients (12.0%), simultaneous hepatic cysts in 36 (11.6%), and intrathoracic extrapulmonary involvement in 14 (4.5%). Surgery consisted of cystotomy with capitonnage in 271 patients (92.2%), cystotomy and closure of bronchial openings in 20 (6.8%), and lobectomy in 3 (1.0%). Hospital mortality was zero; postoperative complications developed in 21 patients (6.8%). Conclusions: Cystotomy with capitonnage has a low complication rate. Pulmonary resection is best limited to patients with parenchymal destruction secondary to infection. © 2012 The Society of Thoracic Surgeons.
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    An alternative biphasic nutrient medium for the diagnosis of cutaneous leishmaniasis; [Kutanöz Leyşmanyazis Tanisinda Alternatif Bifazik Nutrient Besiyeri]
    (Ankara Microbiology Society, 2015) Aksoy Gökmen A.; Öncel K.; Özdemir O.A.; Pektaş B.; Çavuş I.; Güngör S.; Uzun B.; Kaya S.; Karaca S.; Yula E.; Demirci M.; Özbilgin A.
    Cutaneous leishmaniasis (CL) caused by the Leishmania spp. parasites, is a disease characterized by nodulo-ulcerative lesions in the skin. CL is transmitted to humans by infected sandflies during blood sucking, and is endemic in about 98 countries over the world. The demonstration of amastigotes via microscopic examination, and the growth of promastigotes in NNN (Novy-MacNeal-Nicolle) medium are gold standard methods for laboratory diagnosis. The aim of this study was to compare the biphasic NNN medium that is frequently used in routine laboratories with the biphasic nutrient medium that can be prepared easily in microbiology laboratories, for the growth of promastigotes. In the study, the aspiration fluid sample was used as clinical sample which was obtained from the skin lesion of a 47-year-old female patient admitted to izmir Katip Celebi Ataturk Education and Research Hospital dermatology outpatient clinic and pre-diagnosed as CL. The aspirate sample taken from the lesion was evaluated with microscopy, cultivation in two different media and real-time polymerase chain reaction (Rt-PCR) methods. In microscopic examination Leishmania amastigotes were observed in Ciemsa-stained smears prepared from the aspiration fluid. In Rt-PCR performed by using specific primers and probes targeting ITS1 region of Leishmania parasite, a melting-curve compatible with L.tropica was detected. For cultivation, triple inoculations of the aspirate sample into NNN (NNN + RPMI 1640 + 10% fetal calf serum) and nutrient media (nutrient agar + nutrient broth + 10% fetal calf serum) were used. The cultures were incubated at 27°C for 10 days, and the number of propagated promastigotes were counted on the third, seventh and tenth days. The growth of Leishmania promastigotes was detected in both media on the third day. The number of promastigotes grown in NNN medium on the third, seventh and tenth days were 105/ml, 106/ml and 108/ml, respectively. Those values in nutrient medium were 106/ml, 107/ml and 108/ml on the third, seventh and tenth days, respectively. Although the number of promastigotes on the third and seventh days were higher in nutrient medium than NNN medium, the number of cultivated promastigotes were equal on the tenth day. As a result, nutrient medium is considered to have an impact in the diagnosis of CL, by providing an alternative to the routine medium used and can readily be available in microbiology and parasitology laboratories with long shelf-life. It was concluded that biphasic nutrient medium could be used as a supplementary medium for diagnosis in laboratories in the absence of NNN medium or can not be provided.
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    The course of spinal tuberculosis (Pott disease): Results of the multinational, multicentre Backbone-2 study
    (Elsevier B.V., 2015) Batirel A.; Erdem H.; Sengoz G.; Pehlivanoglu F.; Ramosaco E.; Gülsün S.; Tekin R.; Mete B.; Balkan I.I.; Sevgi D.Y.; Giannitsioti E.; Fragou A.; Kaya S.; Cetin B.; Oktenoglu T.; Celik A.D.; Karaca B.; Horasan E.S.; Ulug M.; Senbayrak S.; Kaya S.; Arslanalp E.; Hasbun R.; Ates-Guler S.; Willke A.; Senol S.; Inan D.; Güclü E.; Ertem G.T.; Koc M.M.; Tasbakan M.; Ocal G.; Kocagoz S.; Kusoglu H.; Güven T.; Baran A.I.; Dede B.; Karadag F.Y.; Yilmaz H.; Aslan G.; Al-Gallad D.A.; Cesur S.; El-Sokkary R.; Sirmatel F.; Savasci U.; Karaahmetoglu G.; Vahaboglu H.
    We aimed to describe clinical, laboratory, diagnostic and therapeutic features of spinal tuberculosis (ST), also known as Pott disease. A total of 314 patients with ST from 35 centres in Turkey, Egypt, Albania and Greece were included. Median duration from initial symptoms to the time of diagnosis was 78 days. The most common complications presented before diagnosis were abscesses (69%), neurologic deficits (40%), spinal instability (21%) and spinal deformity (16%). Lumbar (56%), thoracic (49%) and thoracolumbar (13%) vertebrae were the most commonly involved sites of infection. Although 51% of the patients had multiple levels of vertebral involvement, 8% had noncontiguous involvement of multiple vertebral bodies. The causative agent was identified in 41% of cases. Histopathologic examination was performed in 200 patients (64%), and 74% were consistent with tuberculosis. Medical treatment alone was implemented in 103 patients (33%), while 211 patients (67%) underwent diagnostic and/or therapeutic surgical intervention. Ten percent of the patients required more than one surgical intervention. Mortality occurred in 7 patients (2%), and 77 (25%) developed sequelae. The distribution of the posttreatment sequelae were as follows: 11% kyphosis, 6% Gibbus deformity, 5% scoliosis, 5% paraparesis, 5% paraplegia and 4% loss of sensation. Older age, presence of neurologic deficit and spinal deformity were predictors of unfavourable outcome. ST results in significant morbidity as a result of its insidious course and delayed diagnosis because of diagnostic and therapeutic challenges. ST should be considered in the differential diagnosis of patients with vertebral osteomyelitis, especially in tuberculosis-endemic regions. Early establishment of definitive aetiologic diagnosis and appropriate treatment are of paramount importance to prevent development of sequelae. © 2015 European Society of Clinical Microbiology and Infectious Diseases.
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    Comparison of brucellar and tuberculous spondylodiscitis patients: Results of the multicenter "backbone-1 Study"
    (Elsevier Inc., 2015) Erdem H.; Elaldi N.; Batirel A.; Aliyu S.; Sengoz G.; Pehlivanoglu F.; Ramosaco E.; Gulsun S.; Tekin R.; Mete B.; Balkan I.I.; Sevgi D.Y.; Giannitsioti E.; Fragou A.; Kaya S.; Cetin B.; Oktenoglu T.; Dogancelik A.; Karaca B.; Horasan E.S.; Ulug M.; Inan A.; Kaya S.; Arslanalp E.; Ates-Guler S.; Willke A.; Senol S.; Inan D.; Guclu E.; Tuncer-Ertem G.; Meric-Koc M.; Tasbakan M.; Senbayrak S.; Cicek-Senturk G.; Sirmatel F.; Ocal G.; Kocagoz S.; Kusoglu H.; Guven T.; Baran A.I.; Dede B.; Yilmaz-Karadag F.; Kose S.; Yilmaz H.; Aslan G.; Algallad D.A.; Cesur S.; El-Sokkary R.; Bekiroǧlu N.; Vahaboglu H.
    Background Context No direct comparison between brucellar spondylodiscitis (BSD) and tuberculous spondylodiscitis (TSD) exists in the literature. Purpose This study aimed to compare directly the clinical features, laboratory and radiological aspects, treatment, and outcome data of patients diagnosed as BSD and TSD. Study Design A retrospective, multinational, and multicenter study was used. Patient Sample A total of 641 (TSD, 314 and BSD, 327) spondylodiscitis patients from 35 different centers in four countries (Turkey, Egypt, Albania, and Greece) were included. Outcome Measures The pre- and peri- or post-treatment spinal deformity and neurologic deficit parameters, and mortality were carried out. Methods Brucellar spondylodiscitis and TSD groups were compared for demographics, clinical, laboratory, radiological, surgical interventions, treatment, and outcome data. The Student t test and Mann-Whitney U test were used for group comparisons. Significance was analyzed as two sided and inferred at 0.05 levels. Results The median baseline laboratory parameters including white blood cell count, C-reactive protein, and erythrocyte sedimentation rate were higher in TSD than BSD (p<.0001). Prevertebral, paravertebral, epidural, and psoas abscess formations along with loss of vertebral corpus height and calcification were significantly more frequent in TSD compared with BSD (p<.01). Surgical interventions and percutaneous sampling or abscess drainage were applied more frequently in TSD (p<.0001). Spinal complications including gibbus deformity, kyphosis, and scoliosis, and the number of spinal neurologic deficits, including loss of sensation, motor weakness, and paralysis were significantly higher in the TSD group (p<.05). Mortality rate was 2.22% (7 patients) in TSD, and it was 0.61% (2 patients) in the BSD group (p=.1). Conclusions The results of this study show that TSD is a more suppurative disease with abscess formation requiring surgical intervention and characterized with spinal complications. We propose that using a constellation of constitutional symptoms (fever, back pain, and weight loss), pulmonary involvement, high inflammatory markers, and radiological findings will help to differentiate between TSD and BSD at an early stage before microbiological results are available. © 2015 Elsevier Inc.
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    Evaluation of prognostic factors in localized high-grade undifferentiated pleomorphic sarcoma: report of a multi-institutional experience of Anatolian Society of Medical Oncology
    (Springer Science and Business Media B.V., 2016) Ozcelik M.; Seker M.; Eraslan E.; Koca S.; Yazilitas D.; Ercelep O.; Ozaslan E.; Kaya S.; Hacibekiroglu I.; Menekse S.; Aksoy A.; Taskoylu B.Y.; Varol U.; Arpaci E.; Ciltas A.; Oksuzoglu B.; Zengin N.; Gumus M.; Aliustaoglu M.
    Most data on prognostic factors for patients with high-grade undifferentiated pleomorphic sarcoma (HGUPS) is obtained from analyses of soft tissue sarcomas. The purpose of this study was to evaluate the clinicopathologic features and their impact on outcomes specifically in patients diagnosed with HGUPS. In this multicenter trial, we retrospectively analyzed 112 patients who were diagnosed and treated at 12 different institutions in Turkey. We collected data concerning the patients, tumor characteristics, and treatment modalities. There were 69 males (61.6 %) and 43 females (38.4 %). Median age was 56 years (19–90). The most common anatomic site of tumor origin was the upper extremity. Pleomorphic variant was the predominant histological subtype. Median tumor size was 8.2 cm (0.6–30 cm). Tumors were mainly deeply seated (57.1 %). Fifty-seven patients (50.9 %) were stage II and the remainder were stage III at the time of diagnosis. Median follow-up was 30 months (2–160). The primary site of distant metastasis was the lung (73.5 %) and the second most common site was the liver (11.7 %). The 5-year overall survival, distant metastasis-free survival, and local recurrence-free survival rates were 56.3, 53.4, and 67.2 %, respectively. Multivariate analysis showed that Eastern Cooperative Oncology Group (ECOG) performance score of II (p = 0.033), deep tumor location (p = 0.000), and development of distant metastasis (p = 0.004) were negatively correlated with overall survival, and perioperative radiotherapy and negative microscopic margins were significant factors for local control rates (p = 0.000 for each). Deep tumor location (p = 0.003) was the only adverse factor related to distant metastasis-free survival. Deep tumor location, ECOG performance score of II, and development of distant metastasis carry a poor prognostic implication on overall survival. These will aid clinicians in predicting survival and treatment decision. © 2015, International Society of Oncology and BioMarkers (ISOBM).
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    Cryptosporidium spp. During chemotherapy: A cross-sectional study of 94 patients with malignant solid tumor
    (King Faisal Specialist Hospital and Research Centre, 2021) Karabey M.; Can H.; Öner T.Ö.; Döşkaya M.; Alak S.E.; Döşkaya A.D.; Karakavuk M.; Köseoğlu A.E.; Ün C.; Gürüz A.Y.; Alacacıoğlu A.; Pektaş B.; Gül A.; Kaya S.; Gökmen A.A.
    BACKGROUND: Cryptosporidium spp. is a protozoan parasite that infects many vertebrate animals, including humans. Since Cryptosporidium spp. can cause chronic life-threatening diarrhea and severe malabsorption in immunocompromised patients, we investigated the prevalence of this parasite among patients undergoing chemotherapy for malignant solid tumors. OBJECTIVE: Investigate the prevalence of Cryptosporidium spp. in stool samples. DESIGN: Cross-sectional. SETTING: Tertiary care. PATIENTS AND METHODS: Stool samples were collected from adult patients with malignant solid tumors receiving chemotherapy and diarrhea. Cryptosporidium spp. prevalence was determined using Ziehl-Neelsen staining, ELISA, and real-time PCR targeting of the COWP gene. MAIN OUTCOME MEASURE: The prevalence of Cryptosporidium spp. in patients undergoing chemotherapy for malignant solid tumors. SAMPLE SIZE: 94 RESULTS: The prevalence was 2.1% (2/94), 5.3% (5/94), and 5.3% (5/94) as detected by Ziehl-Neelsen staining, real-time PCR and ELISA, respectively. The prevalence reached 8.5% (8/94) using all results obtained from the three methods. Among eight positive stool samples, four were positive by at least two different methods (Ziehl-Neelsen staining-ELISA or ELISA-real-time PCR) whereas the remaining four were positive by either ELISA or real-time PCR. CONCLUSION: These findings show the risk of cryptosporidiosis in cancer patients and the necessity to use at least two diagnostic methods during the diagnosis of cryptosporidiosis to reach more accurate and trustworthy results. LIMITATIONS: Further studies with a larger sample size are recommended. Copyright: Copyright © 2021, Annals of Saudi Medicine, Saudi Arabia. This is an open access article under the Creative Commons Attribution-NonCommercialNoDerivatives 4.0 International License (CC BY-NC-ND). The details of which can be accessed at http://creativecommons. org/licenses/bync-nd/4.0/
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    Molecular investigation of Blastocystis sp. and its subtypes in cancer patients under chemotherapy in Aegean region, Turkey
    (Elsevier B.V., 2022) Öncü Öner T.; Karabey M.; Can H.; Değirmenci Döşkaya A.; Karakavuk M.; Gül A.; Köseoğlu A.E.; Döşkaya M.; Ün C.; Gürüz A.Y.; Kaya S.; Pektaş B.; Aksoy Gökmen A.
    Blastocystis sp. is a common enteric protist found in humans and many other animals. Although the clinical relevance of Blastocystis sp. is currently fully unknown for humans, the prevalence of Blastocystis and subtypes are investigated in immunocompetent individuals presenting with symptoms like diarrhea or immunocompromised individuals including cancer patients. In this comprehensive study, the prevalence of Blastocystis sp. and subtypes were investigated in patients (n=94) with different types of malignant solid tumors using PCR targeting SSU rDNA gene and sequencing. All patients were undergoing chemotherapy and had diarrhea. According to obtained results, 46 patients were found to be Blastocystis positive and the molecular prevalence was detected as 48.9%. Among the positive specimens, 43 (43/46; 93.5%) of them were successfully subtyped. ST4 was the most predominant subtype and detected in 24 (55.8%) patients, followed by ST1 (11 patients, 25.6%) and ST3 (8 patients, 18.6%). In the colon cancer group, which had the highest number of patients, Blastocystis sp. was detected with a higher prevalence rate of 61.5% compared with the prevalence rate (48.9%) of all patients. Interestingly, ST3 was not detected in any of this patient group in contrast to ST4 and ST1. In conclusion, high prevalence of the Blastocystis in the immunocompromised patient groups shows the susceptibility of this patient group against any other infectious agents. © 2022
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    Molecular prevalence and genotypes of Enterocytozoon bieneusi in cancer patients under chemotherapy in Aegean region of Türkiye
    (BioMed Central Ltd, 2024) Aksoy Gökmen A.; Öncü Öner T.; Erkunt Alak S.; Koçkaya E.S.; Güvendi M.; Karabey M.; Alacacıoğlu A.; Pektaş B.; Değirmenci Döşkaya A.; Karakavuk M.; Döşkaya M.; Ün C.; Gürüz A.Y.; Kaya S.; Can H.
    Background: Enterocytozoon bieneusi is the most common species found in humans. Although E. bieneusi has been investigated in humans, genotype profile of E. bieneusi is not known in Türkiye. Methods: In this study, we screened E. bieneusi in patients (n = 94) with different types of malignant solid tumors by Real Time PCR and then sequenced E. bieneusi positive samples. All cancer patients were undergoing chemotherapy and had diarrhea. Moreover, as control groups, we also screened E. bieneusi in patients with diarrhea (n = 50) and without diarrhea (n = 50). Results: Among all patients analyzed, 33 (17%) were found to be E. bieneusi-positive. As the patients were categorized, the molecular prevalence of E. bieneusi increased to 25.5% among cancer patients with diarrhea. However, the molecular prevalence of E. bieneusi was found to be lower in patients with presenting only diarrhea (8%) and patients without diarrhea (10%). The high molecular prevalence value detected among cancer patients with diarrhea was also statistically significant compared to other patient groups (P = 0.00112 and P = 0.0269). Among the 33 Real Time PCR positive samples, 10 of them were amplified by nested PCR and among these 10 samples, 6 of them were successfully genotyped. The phylogenetic tree showed the presence of D and Type IV which were also identified in stray cats living in İzmir in our previous study. Conclusions: High molecular prevalence value indicates the importance of screening stool samples of cancer patients with diarrhea for E. bieneusi and genotyping results indicate that D and Type IV are circulating between humans and cats. © The Author(s) 2024.