what is this
A bleb is a small collection of fluid. The word apical doesn't necessarily mean the lungs. Apical blebs can take place is places other than the lungs. Apical pleural or subpleural blebs refer specifically to those surrounded by the lungs. Little pockets of fluid. And, yes, the apex, the apical portion is the uppermost part of the lungs and is located simply below the clavicle (collarbone).
try looking it up on Yahoo! Seach or on http://www.wikipedia.com
blebs in your lungs are only just air pockets. could be due to any number of lung diseases including cystic fibrosis, tuberculosis, pneumonia, or emphysema.
apical basically means the location- it's surrounded by the top part of your lungs