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Background Distal-type bronchiolar adenoma (BA) is a benign lung neoplasm characterized by a bilayered structure. However, atypical variants lacking continuous basal cell layers pose diagnostic challe...
Distal-type Bronchiolar Adenoma
Atypical distal-type Bronchiolar Adenoma
Adenocarcinoma
Claudin18.2
Immunohistochemical staining
SinoXiv