Related Experiment Video
Updated: Jun 1, 2026
07:36
Angiogenesis in the Ischemic Rat Lung
Published on: February 8, 2013
Lung vasculitis and alveolar hemorrhage: pathology
Gregory A Fishbein1, Michael C Fishbein
1David Geffen School of Medicine at UCLA, Los Angeles, California.
Seminars in Respiratory and Critical Care Medicine
|June 16, 2011
Summary
Pulmonary vasculitides involve lung vessel inflammation, presenting diagnostic challenges. Anti-neutrophil cytoplasmic antibody (ANCA)-associated small-vessel diseases like Wegener granulomatosis are key types.
Area of Science:
- Pulmonary Medicine
- Rheumatology
- Pathology
Background:
- Pulmonary vasculitides are inflammatory disorders affecting lung vessels and tissue.
- Diagnosis is complex due to overlapping features and varied presentations.
- Anti-neutrophil cytoplasmic antibody (ANCA)-associated small-vessel diseases are the primary forms.
Purpose of the Study:
- To review the classification and diagnosis of pulmonary vasculitides.
- To highlight key clinical, serological, and histopathological features.
- To discuss diffuse alveolar hemorrhage (DAH) as a severe manifestation.
Main Methods:
- Literature review of pulmonary vasculitides.
- Analysis of diagnostic challenges and classification criteria.
- Examination of associated conditions and idiopathic forms.
Main Results:
- ANCA-associated small-vessel diseases (WG, CSS, MPA) are major types.
- Diffuse alveolar hemorrhage (DAH) is a severe complication, often in MPA and WG.
- Other conditions like Goodpasture syndrome and SLE can cause DAH.
Conclusions:
- Pulmonary vasculitides require careful evaluation due to diverse presentations.
- ANCA-associated vasculitides and DAH are critical areas for clinical focus.
- Idiopathic forms like isolated pulmonary capillaritis exist.
More Related Videos
09:28Intravital Widefield Fluorescence Microscopy of Pulmonary Microcirculation in Experimental Acute Lung Injury Using a Vacuum-Stabilized Imaging System
Published on: April 6, 2022
09:22Chronic Thromboembolic Pulmonary Hypertension and Assessment of Right Ventricular Function in the Piglet
Published on: November 4, 2015
Related Concept Videos
01:29Hemorrhagic Stroke ll: Pathophysiology
A hemorrhagic stroke develops when a cerebral blood vessel ruptures, allowing blood to escape into the surrounding brain tissue, as in intracerebral hemorrhage (ICH), or into the subarachnoid space, as in subarachnoid hemorrhage (SAH). Because the skull is a rigid compartment, the sudden presence of extravascular blood rapidly increases intracranial pressure and compresses adjacent neural structures, leading to immediate tissue injury and impaired cerebral perfusion.Mass Effect and Primary...
01:30Venous Thrombosis I: Introduction
Venous thrombosis, the most common disorder of the veins, involves the formation of a thrombus or blood clot associated with vein inflammation. It can be classified as either superficial vein thrombosis or deep vein thrombosis.Superficial Vein Thrombosis: This involves the formation of a thrombus in a superficial vein, usually the greater or lesser saphenous vein. Though less severe than deep vein thrombosis (DVT), SVT can lead to complications if untreated.Deep Vein Thrombosis (DVT): This...
01:18Pulmonary Edema II: Pathophysiology
Pulmonary edema is the accumulation of fluid in the interstitial and alveolar spaces of the lungs, impairing gas exchange and oxygen delivery. It may be cardiogenic or noncardiogenic, but both reduce oxygenation and lung compliance.Cardiogenic Pulmonary EdemaCardiogenic edema results from increased hydrostatic pressure in pulmonary capillaries, usually due to left ventricular dysfunction from myocardial infarction, heart failure, or valvular disease. Ineffective cardiac pumping causes blood to...
01:22Cerebral Edema ll: Pathophysiology
Vasogenic edema is a major form of cerebral edema characterized by abnormal accumulation of fluid in the brain’s extracellular space due to disruption of the blood–brain barrier (BBB). The BBB is a specialized structure composed of endothelial cells connected by tight junctions, supported by astrocytic endfeet and a basement membrane. Under normal conditions, it tightly regulates the movement of ions, proteins, and solutes between the bloodstream and brain parenchyma. When this barrier loses...
01:30Pulmonary Hypertension: Classification and Pathogenesis
Pulmonary hypertension (PH) is a severe health condition in which the mean pulmonary arterial pressure increases to 25 mmHg or more, even when the body is at rest. This high pressure in the blood vessels that transport blood from the heart to the lungs can cause various symptoms, including shortness of breath, can lead to right heart failure, and significantly affect the overall quality of life.
There are various classifications for PH, each relating to different underlying causes and also...
There are various classifications for PH, each relating to different underlying causes and also...
01:10Atelectasis II: Pathophysiology
Atelectasis develops when alveoli lose their air and collapse inward. Because lung tissue is naturally elastic, these air sacs shrink rather than remaining open. Collapsed alveoli are no longer ventilated, reducing their role in gas exchange. Blood flow may continue in these regions, creating a ventilation–perfusion mismatch. Clinical findings include decreased breath sounds, dullness to percussion, reduced chest expansion, and decreased tactile fremitus as sound transmission through collapsed...