A fluid filled blister more than 5mm in diameter with thin walls. A bulla on the skin is a blister; a bulla within the tissues is more often referred to as a bleb (e.g. on the pleura – the membrane covering the lung.
A fluid filled blister more than 5mm in diameter with thin walls. A bulla on the skin is a blister; a bulla within the tissues is more often referred to as a bleb (e.g. on the pleura – the membrane covering the lung.