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Role of endoscopic ultrasound guided fine needle aspiration/biopsy in the evaluation of intra-abdominal lymphadenopathy due to tuberculosis

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World Journal of Gastrointestinal Endoscopy 2021年第12期13卷 649-658页

作者： Harshavardhan Rao B Priya Nair S krishna Priya Archana George Vallonthaiel Dipu T Sathyapalan anoop k koshy Rama P Venu Department of Gastroenterology Amrita Institute of Medical SciencesKochi 682041KeralaIndia Department of Pathology Amrita Institute of Medical SciencesKochi 682041KeralaIndia Department of Internal Medicine Amrita Institute of Medical Sciences and Research CentreKochi 682041KeralaIndia

BACkGROUND Intra-abdominal lymphadenopathy due to tuberculosis(TB)poses a diagnostic challenge due to difficulty in tissue *** endoscopic ultrasound guided fine needle aspiration/biopsy(EUS-FNA/B)has shown promise in the evaluation of mediastinal lymph nodes,its role in the evaluation of intra-abdominal lymphadenopathy is not *** To assess the role of EUS-FNA/B in the evaluation of intra-abdominal lymphadenopathy due to *** This was a retrospective study where patients with intra-abdominal lymphadenopathy who underwent evaluation with EUS-FNA/B were *** was diagnosed if the patient had any one of the following:(1)Positive acid fast bacilli(AFB)stain/TB GeneXpert/TB-polymerase chain reaction/AFB culture of tissue sample;and(2)Positive Mantoux test and response to anti-tubercular ***-FNA reports,clinical reports and imaging characteristics of patients were recorded for a detailed analysis of patients with *** A total of 149 patients underwent an EUS-FNA/B from lymph nodes(mean age 51±17 years,M:F=1.2).Benign inflammatory reactive changes were seen in 45 patients(30.2%),while 54 patients(36.2%)showed granulomatous inflammation with/without *** these,51 patients(94.4%)were confirmed to have TB as per pre-defined *** with TB were more likely to have hypoechoic and matted nodes[40 patients(67.7%)].EUS-FNA/B was found to have a sensitivity and specificity of 86%and 93%respectively,with a diagnostic accuracy of 88%in the evaluation of intra-abdominal lymphadenopathy due to *** EUS-FNA/B has a high diagnostic yield with a good sensitivity and specificity in the evaluation of intra-abdominal lymphadenopathy due to ***,the validity of these findings in populations with low prevalence of TB needs further evaluation.

关键词： Endoscopic ultrasound Lymph nodes Tuberculosis Mesenteric Intraabdominal

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引用

Journal of Semiconductors 2015年第12期36卷 24-29页

作者： Jiji koshy Soosen Samuel.M anoop Chandran k.C.George Department of Physics S.B.College

The ac conduction mechanism in copper oxide nanoparticles with 8 nm size, synthesized by a precipitation method was studied by analyzing ac conductivity in the frequency range of 50 Hz-1 MHz and in the temperature range of 373-573 k. X-ray diffraction and transmission electron microscopy （TEM） were employed for the structural and morphological characterization of CuO nanoparticles. The experimental and theoretical in- vestigations suggested that the ac conduction mechanism in CuO nanoparticles can be successfully explained by a correlated barrier hopping model, which provided reasonable values for the maximum barrier height and characteristic relaxation time. It was also found that bipolaron hopping become prominent up to a particular temperature and beyond that single polaron hopping predominates. Physical parameters such as hopping distance and density of defect states were also calculated. Photoluminescence studies confirm the presence of a surface defect in CuO nanoparticles.

关键词： CuO nanoparticles correlated barrier hopping defect states photoluminescence spectrum single polaron hopping

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