https://www.selleckchem.com/products/3-methyladenine.html Hepatitis B virus (HBV) infection remains a global public health problem. Among its modes of transmission, vertical transmission from mother to child during pregnancy is exceedingly important. This study investigated seropositivity for hepatitis B surface antigen (HBsAg) among pregnant women aged 16-49 years and their pregnancy outcomes in several health institutions (university and state hospitals, family health centers) from seven cities in Turkey. An Excel form was sent to the sites participating in the study, and the total number of pregnant women who were tested for HBsAg between 2010 and 2017, HBsAg positivity rates, and the ages of HBsAg-positive pregnant women was collected retrospectively. Serum samples were obtained from 204,865 pregnant women from four regions between 2010 and 2017, including 107,463 from Black Sea, 2306 from Marmara, 48,339 from East Anatolia, and 46,757 from Aegean. HBsAg levels were determined on automated devices using chemiluminescence. In the study, the data of 204,865 Turkey and that it is significantly lower, especially in those born after the initiation of the national vaccination program. Continuation of national neonatal HBV vaccination with high compliance is very important. The objective of the study was to determine the parameters that can be used to predict malignancy in persistent cervical lymphadenopathies. We retrospectively reviewed the files of 162 patients diagnosed with persistent cervical lymphadenopathy who underwent an excisional biopsy in our department between January 2011 and October 2019. Patient demographics and the size, side, duration, and localization of lymphadenopathy were recorded, and their relationship with histopathological results was investigated. Multiple regression analysis was used to determine the relationship between clinical parameters and malignancy. Of the 162 patients, 91 (56.2%) were male and 71 (43.8%) were female, and the mean ag