@entity1 1: An 18-year-old @entity1 was admitted to our hospital with pneumothorax. She had no history of smoking. Chest CT showed @entity45 , and @entity5930 was diagnosed by open lung biopsy. She recovered without therapy 3 months later and a chest CT taken at that time was normal. She began smoking, 3 years later, and bore two @entity1 . She is without recurrence after 8 years. @entity1 2: A 23-year-old @entity1 was admitted to our hospital with pneumothorax. He had a smoking history (index = 180). Chest CT showed @entity45 , and @entity5930 was diagnosed by open lung biopsy. He stopped smoking and recovered without therapy one month later, and subsequently, his CT findings returned to normal. Two years later, he began smoking again, but has no relapse. @entity1 3: A 21-year-old @entity1 was admitted to our hospital with pneumothorax. He had no history of smoking. A chest CT showed @entity45 , and @entity5930 was diagnosed by open lung biopsy. @entity2010 was subsequently noted. @entity1353 persisted, and he recovered 4 months later after @entity134 treatment. He was without relapse 2 years later but the @entity45 remained. We report three cases of @entity5930 , and discuss their pertinent clinical features.

[Clinical investigation of three cases of XXXX ].

@entity1 :: ('9606', 'Species') :: ['children', 'woman', 'Patient', 'man'] @entity1353 :: ('MESH:D004417', 'Disease') :: ['Dyspnea'] @entity5930 :: ('MESH:D011657', 'Disease') :: ['pulmonary eosinophilic granuloma'] @entity134 :: ('CHEBI:35341', 'Chemical') :: ['steroid'] @entity45 :: ('MESH:D010181', 'Disease') :: ['multiple cysts'] @entity2010 :: ('MESH:D003919', 'Disease') :: ['Diabetes insipidus']
@entity5930 :: (MESH:D011657,Disease) :: ['pulmonary eosinophilic granuloma']
