Abstract
Up to the present, no definite conceptions were ever be given as to the difinition, classification or so-called lung cyst and especially its relation to bronchiectasia. The present authors investigated an operatively cured case placing the emphasis on its relation to bronchiectasia. Thus, the authors proved that the so-called lung cyst is nothing by the dystic bronchiectasia. The classification is : —
I. Bronchial lung cyst (including so-called cystic bronchiectasia and honey comb lung)
II. Bronchial alveolar lung cyst
III. Alveolar lung cyst
The authors considered it proper that a word like Blebs, Bulla or Pneumatocele indicating its originating tissue be placed before lung cyst, and that each of them should be further divided into “prenatal prenatal and postnatal” and “solitary and multiple” to give easily understandable classification.
