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Large, right lower lobe pneumatocele is shown, compromising ventilation in a premature infant with RDS and superimposed RSV pneumonitis. A pneumatocele is a cavity in the lung parenchyma filled with air that may result from pulmonary trauma during mechanical ventilation. [1] Gas-filled, or air-filled lesions in bone are known as pneumocysts. [2]
A focal lung pneumatosis is an enclosed pocket of air or gas in the lung and includes blebs, bullae, pulmonary cysts, and lung cavities. Blebs and bullae can be classified by their wall thickness. [1] A bleb has a wall thickness of less than 1 mm. [2] By radiology definition, it is up to 1 cm in total size. [3]
Low magnification micrograph of pneumatosis intestinalis in bowel wall.. Pneumoperitoneum (or peritoneal emphysema), air or gas in the abdominal cavity.The most common cause is a perforated abdominal viscus, generally a perforated peptic ulcer, although any part of the bowel may perforate from a benign ulcer, tumor or abdominal trauma.
[1] [2] Blebs can grow larger or join together to create a larger cyst, or bulla. There are usually no symptoms unless a pneumothorax occurs or the bulla grows very large. Blebs are usually associated with emphysema. [3] In ophthalmology, blebs may be formed intentionally in the treatment of glaucoma.
Bullectomy is a surgical procedure in which dilated air-spaces or bullae in lung parenchyma are removed. [1] Common causes of dilated air-spaces include chronic obstructive pulmonary disease and emphysema. Patients with giant bullae filling half the thoracic volume and compressing relatively normal adjacent parenchyma are recommended for ...
Bulla (dermatology), large blister; Bulla, a focal lung pneumatosis, an air pocket in the lung; Auditory bulla, a hollow bony structure on the skull enclosing the ear; Ethmoid bulla, part of the ethmoid bone of the skull; Bulla, a genus of sea snails
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A large bulla and a smaller bleb illustrated. Focal emphysema is a localized region of emphysema in the lung that is larger than alveoli, and often associated with coalworker's pneumoconiosis. [40] This is also known as localized pulmonary emphysema. [41] Blebs and bullae may also be included as focal emphysema.