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Related Concept Videos

Cellular Injury IV: Necrosis01:16

Cellular Injury IV: Necrosis

Necrosis is a form of irreversible cell death caused by severe injury such as ischemia, toxins, or trauma. Unlike programmed cell death, it is an uncontrolled, pathological process that typically provokes inflammation in surrounding tissues.Pathophysiologic ChangesNecrosis begins when cells sustain critical damage, leading to swelling of organelles, particularly mitochondria, and rapid ATP depletion. As energy levels decline, membrane ion pumps fail, leading to calcium influx and eventually,...
Pulmonary Tuberculosis II01:28

Pulmonary Tuberculosis II

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...
Necrosis01:16

Necrosis

Necrosis is considered as an “accidental” or unexpected form of cell death that ends in cell lysis. The first noticeable mention of “necrosis” was in 1859 when Rudolf Virchow used this term to describe advanced tissue breakdown in his compilation titled “Cell Pathology”.
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become anucleated and die, but their...
Chronic Inflammation: Introduction01:12

Chronic Inflammation: Introduction

Chronic inflammation is a prolonged, dysregulated immune response that persists for weeks to years when the inciting stimulus is difficult to eradicate or when self‑antigens drive ongoing reactivity. Morphologically, it is defined by mononuclear cell infiltration, progressive tissue destruction, and concurrent attempts at healing via angiogenesis and fibrosis. Compared with acute inflammation, edema is less prominent while cellular infiltration predominates; triggers include persistent...
Graves Disease II: Pathophysiology01:24

Graves Disease II: Pathophysiology

Graves’ disease is an autoimmune disorder characterized by the production of thyroid-stimulating immunoglobulins (TSI) that activate TSH receptors, leading to excessive synthesis and release of thyroid hormones (T3 and T4) and resulting in hyperthyroidism.Among all causes of hyperthyroidism, Graves’ disease is the most common and can happen at any age, though it is more frequent in women. It produces a hypermetabolic state with features such as weight loss, tachycardia, tremor, and heat...
Pulmonary Tuberculosis III01:31

Pulmonary Tuberculosis III

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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Related Experiment Videos

Necrotizing sarcoid granulomatosis.

John Yeboah1, Michelle Afkhami, Christopher Lee

  • 1Keck School of Medicine, Los Angeles, California 90033, USA. Yeboah@usc.edu

Current Opinion in Pulmonary Medicine
|July 26, 2012
PubMed
Summary

Necrotizing sarcoid granulomatosis (NSG) is a rare and perplexing condition. This review explores its ambiguous presentations, diagnostic challenges, and current management strategies, including steroids and surgery.

Related Experiment Videos

Area of Science:

  • Pulmonology
  • Pathology
  • Rheumatology

Background:

  • Necrotizing sarcoid granulomatosis (NSG) presents with diverse clinical and histological features, often leading to diagnostic confusion.
  • While primarily affecting women in their late forties, NSG can occur in children and involve multiple organ systems beyond the lungs.

Purpose of the Study:

  • To review current evidence-based information on the clinical and basic science aspects of NSG.
  • To clarify the diagnostic challenges and taxonomic position of NSG, differentiating it from other granulomatous diseases.

Main Methods:

  • Literature review of current evidence-based information.
  • Analysis of clinical presentations, histological findings, and diagnostic criteria for NSG.

Main Results:

  • NSG is taxonomically debated, with some considering it independent and others a sarcoidosis manifestation.
  • Diagnostic confusion arises from nonspecific symptoms and overlapping features with malignancy, Wegener's granulomatosis, and other conditions.

Conclusions:

  • The diagnosis of NSG is challenging due to its perplexing nature and nonspecific symptoms.
  • Management options include corticosteroids, surgical resection for localized disease, or watchful waiting, as no specific treatment is universally advocated.