<prompt> A patient presents with chest pain dt aspiration pneumonitis. On examination there is dullness on percussion in area medial to the medial border of scapula on elevation of arm. Which pa of the lung is most likely to be affectedRight sup. LobeRight post. LobeLeft sup. LobeRight apical lobe  <response>: On elevation of Rt. arm medial border of scapula corresponds to oblique fissure. So on percussing medial to medial border we are percussing apical superior segment of . lower lobeLobes most susceptible to aspiration in spine position is posterior segment of upper lobeQ superior segment of lower lobeQ superior segment of Lt. lower lobeLobe most commonly involved in bronchiectasis is left lower lobe. 