Related Experiment Video
Updated: Apr 16, 2026

Analysis of 18FDG PET/CT Imaging as a Tool for Studying Mycobacterium tuberculosis Infection and Treatment in Non-human Primates
Published on: September 5, 2017
[Computed tomography pattern of unchanged mediastinal lymph nodes in children with uninfected Mycobacterium
Objective:
To provide X-ray characteristics of mediastinal lymph nodes revealed by computed tomography (CT) in children and adolescents with uninfected Mycobacterium tuberculosis.
Material And Methods:
The basis of the study was the results of CT in 105 children and adolescents with uninfected with Mycobacterium tuberculosis. All the children and adolescents from a follow-up group underwent X-ray study using a two-slice spiral Somatom Emotion Duo CT scanner (Siemens). The study used a conventional procedure for chest scanning in children, by applying the Thorax Routine program.
Results:
The study ascertained that Groups 1-3 intrathoracic lymph nodes were visualized in 73.3% of the children in normalcy and were not in 22.8%. In children, the normal size of the lymph nodes did not exceed 0.8 cm in diameter; they had a homogeneous structure and clearly defined, even outlines; their perinodular fat was unchanged. CT data showed that the sizes and number of visible groups of lymph nodes were unrelated to age.
Conclusion:
The upper diameter limit for normal mediastinal lymph nodes may be established to be 8 mm if there were no abnormal changes in the structure of lymph nodes and perinodular fat.
Related Concept Videos
Pulmonary Tuberculosis IV
Several diagnostic approaches are used to detect TB. The conventional method is the Tuberculin Skin Test (TST), also known as the Mantoux test. However, this method has...
Pulmonary Tuberculosis III
The first classification is based on the development of the disease, and it includes the following categories:
Pulmonary Tuberculosis II
Here is a detailed explanation of its pathophysiology:
Transmission: The process begins when a person inhales droplet nuclei containing M. tuberculosis. These are typically released into the air when an individual with pulmonary or...
Pulmonary Tuberculosis I
Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...
Pulmonary Tuberculosis V
Latent tuberculosis infection occurs when TB bacteria are present in a person's body, but are not causing illness or symptoms. It is not contagious, and preventive treatment is crucial to avoid the...
Mitral Stenosis II: Clinical features and Diagnostic Tests
