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(A) Adenocarcinoma with prominent bronchioloalveolar growth pattern. Tumor cells are seen growing along the alveolar walls (H&E, ×10); (B) high power view of adenocarcinoma with bronchioloalveolar growth pattern. The alveolar walls are lined by cuboidal epithelium showing hobnailing and mild cytological atypia (H&E, ×40); (C) adenocarcinoma with mucinous bronchioloalveolar pattern. The cells are columnar shaped with mild cytologic atypia and show abundant mucin production (H&E, ×20).
