title: [An ultrastructural study of undifferentiated bronchogenic carcinoma].
mesh_terms: D002283:Carcinoma, Bronchogenic / Q000648:ultrastructure*; D002289:Carcinoma, Non-Small-Cell Lung / Q000648:ultrastructure; D018288:Carcinoma, Small Cell / Q000648:ultrastructure*; D006801:Humans; D008175:Lung Neoplasms / Q000648:ultrastructure*