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BULA, BLEB, AND CAVITAS
What’s the difference between them?
Pembimbing : dr Maisie Johan, Sp. Rad
Oleh : Cindy Lestari (2008.61.068)
Kepaniteraan Klinik RadiologiFakultas Kedokteran Unika Atma Jaya
Periode 1 Juni – 4 Juli 2009PK St.Carolus Jakarta
Bulla
Bulla: A fluid-filled blister more than 5 mm (about 3/16 inch) in diameter with thin walls.
In Latin a bulla was a "bubble, stud or knob." It referred to any rounded protrusion, particularly one that was hollow or cystic.
(http://www.medterms.com)
Bleb
Bleb: A bladder-like structure more than 5 mm in diameter with thin walls that may be full of fluid. Also called a bulla.
(http://www.medterms.com)
Lung Lesion
I. Cyst: air-filled space with sharply demarcated walls ≤4mm• Bulla: >1cm diameter; smooth wall <1mm
thick
• Bleb: usually <1cm diameter; subpleural or pleural, typically apical distribution
II. Cavity: air-filled space with a relatively thick wall >4mm or within an area of a surrounding infiltrate or mass
Bullae
Pathology : A sharply demarcated region of emphysema; a gas-containing space that may contain nothing but gas or may contain overdistended and ruptured alveolar septa and blood vessels
Bullae
Plain Radiograph: A sharply demarcated
area of avascularity within the lung
measuring 1.0 cm or more in diameter
possessing a wall less than 1mm in thickness
Bullae
CT : round, focal air
space 1cm or more in
diameter demarcated by a
thin wall usually multiple assocated with
other signs of pulmonary emphysema
Bleb
Pathology: A gas-containing space, within or contiguous to the visceral pleura of the lung
Radiology:A local thin-walled lucency, contiguous with the pleura, usually at the lung apex
Cavity
A gas containing space within the lung, surrounded by a wall whose thickness is greater than 1mm and usually irregular in contour.
This word should not be used interchangeably with abscess, which may exist without bronchial communication and therefore without cavitation
It necesssarily means that a cavity communicates with a bronchus.
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