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Related Concept Videos

Pulmonary Tuberculosis III01:31

Pulmonary Tuberculosis III

1.6K
Tuberculosis (TB) is a contagious infection primarily affecting the lung parenchyma but which can also affect other body parts. TB can be classified based on disease development, presentation, and the affected anatomical site.
The first classification is based on the development of the disease, and it includes the following categories:
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Pulmonary Tuberculosis I01:29

Pulmonary Tuberculosis I

1.5K
Tuberculosis, often called TB, is a contagious illness primarily caused by Mycobacterium tuberculosis. It mainly affects the lung parenchyma but can also impact other body parts.
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...
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Pulmonary Tuberculosis II01:28

Pulmonary Tuberculosis II

2.4K
Tuberculosis, or TB, is a bacterial infectious disease caused by Mycobacterium tuberculosis. While its primary impact is on the lungs, leading to pulmonary tuberculosis, it can also affect various other organs, a condition referred to as extrapulmonary tuberculosis.
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...
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Pulmonary Tuberculosis V01:28

Pulmonary Tuberculosis V

927
Medical management of tuberculosis (TB) patients involves a comprehensive approach that includes diagnosis, treatment, and monitoring. The specific strategies can vary depending on the type of tuberculosis (latent or active), the patient's overall health status, and other considerations.
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...
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Pulmonary Tuberculosis IV01:26

Pulmonary Tuberculosis IV

752
Tuberculosis, more commonly referred to as TB, is an infectious disease stemming from Mycobacterium tuberculosis. While it primarily impacts the lungs, TB can also affect other body areas. Given its severity and global impact, timely and accurate diagnosis is crucial for controlling its spread and improving patient outcomes.
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...
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Knee Joint01:23

Knee Joint

3.8K
The knee joint is the most complicated joint in the body. It consists of three articulations– two tibiofemoral and one patellofemoral. As is characteristic of synovial joints, the knee joint has a thin articular capsule that partially surrounds this joint cavity. Additionally, several ligaments, muscles, and cartilaginous structures support the movement of the knee.
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris...
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Related Experiment Video

Updated: Apr 17, 2026

In vivo Macrophage Imaging Using MR Targeted Contrast Agent for Longitudinal Evaluation of Septic Arthritis
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In vivo Macrophage Imaging Using MR Targeted Contrast Agent for Longitudinal Evaluation of Septic Arthritis

Published on: October 20, 2013

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Knee tuberculosis masquerading as pigmented villonodular synovitis.

Sanjay Meena1, Shreesh Kumar Gangary1

  • 1Department of Orthopedics, Maulana Azad Medical College and Associated Lok Nayak Hospital, New Delhi, India.

Journal of Research in Medical Sciences : the Official Journal of Isfahan University of Medical Sciences
|February 25, 2015
PubMed
Summary
This summary is machine-generated.

Tuberculosis (TB) can affect the knee joint, mimicking other conditions like pigmented villonodular synovitis (PVNS). Early diagnosis of tuberculous arthritis requires a high index of suspicion despite atypical symptoms.

Keywords:
Delayed diagnosisextrapulmonary tuberculosispigmented villonodular synovitis kneetuberculosis knee

Related Experiment Videos

Last Updated: Apr 17, 2026

In vivo Macrophage Imaging Using MR Targeted Contrast Agent for Longitudinal Evaluation of Septic Arthritis
07:15

In vivo Macrophage Imaging Using MR Targeted Contrast Agent for Longitudinal Evaluation of Septic Arthritis

Published on: October 20, 2013

9.9K

Area of Science:

  • Orthopedics
  • Infectious Diseases
  • Radiology

Background:

  • Tuberculosis (TB) is resurging globally, driven by HIV and immigration.
  • Tuberculous arthritis presents insidiously with nonspecific symptoms and imaging findings, earning TB the nickname 'the great mimicker'.
  • Monoarticular knee tuberculosis can be misdiagnosed, particularly mimicking pigmented villonodular synovitis (PVNS).

Observation:

  • This report details a young patient with tuberculous arthritis of the knee.
  • Magnetic resonance imaging (MRI) revealed findings such as hemosiderin deposits and a nodular mass, initially suggesting diffuse PVNS.
  • Diagnostic delays occurred due to the misleading imaging characteristics.

Findings:

  • Tuberculous arthritis of the knee can present with imaging findings similar to PVNS.
  • Hemosiderin deposits and nodular masses on MRI may obscure a TB diagnosis.
  • The case highlights the challenge in differentiating tuberculous arthritis from PVNS based solely on initial imaging.

Implications:

  • A high index of suspicion is crucial for diagnosing tuberculous knee arthritis.
  • Clinicians should consider TB in the differential diagnosis of knee joint masses and synovitis, even with atypical presentations.
  • Timely and accurate diagnosis of tuberculous arthritis is essential for appropriate management and preventing joint damage.