Evaluation of Purified Protein Derivative Changes Based on Mediastinal Lymph Node Density

Background: The present study evaluated purified protein derivative (PPD) changes based on mediastinal lymph node density. Methods: This cross-sectional observational was performed 130 patients who were referred to Valiasr and Amir Al-Momenin Hospitals in Arak, Iran for a CT scan non-infectious non-tumor reasons. gender of the recorded, they then underwent non-contrast CT, their density measured recorded Hounsfield units. Patients tuberculin test. induration diameter obtained from test each individual. Data analysis carried out using SPSS software ver. 20. Results: There positive correlation between diameter, so larger results increasing result (r = 0.429, P < 0.001). negative age, i.e., decreased with age (P 0.001, r -0.616). Lymph higher men than women 0.022). Conclusions: is increases decreases age. also women. Therefore, can help ensure an earlier diagnosis pulmonary tuberculosis, measuring recommended.