Least common site for lung abcess is
About the site of lung abscess associated with aspiration . "Because of the effect of gravity, foci of infection tend to develop in the subpleural regions of the superior segments of the lower lobes and in the posterior segments of the upper lobes. The right lung is involved more frequently, presumably because of the less acute angle of the right main bronhus. thus the right upper and lower lobes are the most commonly affected, followed by the left lower lobe and right middle lobe." Ref : Schwaz 9/e p.549
Right upper lobe
Right lower lobe
Left lower lobe
Left upper lobe
Cardio thoracic surgery  