What is meant by bullous disease?
Bullous pemphigoid (BUL-us PEM-fih-goid) is a rare skin condition that causes large, fluid-filled blisters. They develop on areas of skin that often flex — such as the lower abdomen, upper thighs or armpits.
What causes bullous in lungs?
Smoking cigarettes is by far the most common cause of emphysema. And emphysema is by far the most common cause of giant bullae in the lungs. There are limited cases of bullae appearing in the lungs as a result of bronchial illnesses from high air pollution levels, or occupational exposure to chemical fumes.
What causes a bulla?
Friction. One of the most common causes of bullae is friction. This includes the friction that occurs from using a shovel or another tool, or rubbing against the inside of a shoe. Friction blisters appear most often on your hands and feet.
What are vesicles and bullae?
A vesicle is a fluid-filled, dome-shaped lesion of 0.5 cm or less; if such a lesion is greater than 0.5 cm, it is termed a bulla. The fluid inside may be clear or hemorrhagic in nature. If the material is purulent, the lesion is called a pustule.
What causes bullae on the skin?
How bullae is formed in skin?
A bulla is a fluid-filled sac or lesion that appears when fluid is trapped under a thin layer of your skin. It’s a type of blister. Bullae (pronounced as “bully”) is the plural word for bulla.
What is bullous eruption?
The term bullous drug eruptions refers to adverse drug reactions that result in fluid-filled blisters or bullae. Blistering can be due to various medications, prescribed or over-the-counter, natural or synthetic. Blistering may be localised and mild, or widespread and severe, even life-threatening.
How are vesicles formed?
A vesicle forms when the membrane bulges out and pinches off. It travels to its destination then merges with another membrane to release its cargo. In this way proteins and other large molecules are transported without ever having to cross a membrane. Some vesicles form with the help of coat proteins.
What is an example of a bulla?
Bulla: a circumscribed, elevated fluid-filled lesion greater than 1 cm in size (e.g. epidermolysis bullosa, bullous impetigo). Macule: a circumscribed, flat lesion with color change up to 1 cm in size that is not palpable (e.g. ash leaf macules, café au lait macules).
Can lung bullae go away?
New-onset bullae during mechanical ventilation are potentially reversible if positive-pressure ventilation is discontinued. Drastically decreasing the airway pressure is the key management strategy.
What causes blisters on the body?
A blister is a pocket of fluid between the upper layers of skin. The most common causes are friction, freezing, burning, infection, and chemical burns.
Is a blister a lesion?
Common examples of primary skin lesions include freckles, moles, and blisters, among others.
What does bullous mean in a sentence?
Definition of bullous : resembling or characterized by bullae : vesicular bullous lesions Examples of bullous in a Sentence Recent Examples on the Web If bullous lung disease is left untreated, the balloons of air in the lung can burst, leading to this dangerous condition.
What is bullous emphysema?
Emphysema is a limitation in airflow associated with a loss of the distal lung architecture with permanent enlargement of the alveolar space distal to the terminal bronchiole.[1] Eighty percent of patients presenting with bullae have associated pulmonary emphysema, and this entity, therefore, is referred to as bullous emphysema.
What is bullous blistering?
bullous adjective Pertaining to or characterised by bullae, as in bullous pemphigoid, or blistering, as in 2nd-degree burns. Segen’s Medical Dictionary. © 2012 Farlex, Inc.
What are the risk factors for bullous lung disease?
Bullous lung disease risk is closely linked to prolonged cigarette smoking; however, it should be noted that exposure to other forms of smoke can contribute to the development of bullae, too. Exposure to biomass fuels used to heat spaces and cook food can also contribute to bullous lung disease.