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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]
Historically, tuberculosis was the most common cause of the lung cavity (and still is in areas where tuberculosis is endemic); [7] however, the cavity can also be caused by sarcoidosis, bullae, bronchiectasis, or cystic lung disease. [2] Chronic necrotizing aspergillosis and invasive aspergillosis are usually seen in immunocompromised people. [4]
It is thin-walled and may appear as a small blister, more than 5 mm in diameter. It can also be referred to as a bulla. Some clinicians may also include milk blisters as a type of bleb. In addition, a blocked Montgomery gland may also be called a nipple bleb though its cause is different than a milk or serous-filled bleb on the nipple. [2]
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Bulla: A bulla is a large blister, [31] a rounded or irregularly shaped blister equal to or greater than either 5 [10] or 10 mm, [30] depending on one's definition of a vesicle. [ 1 ] "Pustule" redirects here.
This genre-defying novel follows three young women – from the 1500s, 1800s and 2019 – buried in the same soil, their stories “tangling like roots,” publisher Macmillan writes.