title: Small cell (oat cell) carcinoma of the trachea with endocrine features. Report of a case and results of ultrastructural and immunohistochemical study.
abstract: Primary small cell (oat cell) carcinoma of the trachea is very rare. We report a case with ultrastructural evidence of endocrine differentiation. Immunoperoxidase staining demonstrated carcinoembryonic antigen and bombesin in the tumor cells.
mesh_terms: D001839:Bombesin / Q000032:analysis; D002272:Carcinoembryonic Antigen / Q000032:analysis; D018288:Carcinoma, Small Cell / Q000032:analysis / Q000648:ultrastructure*; D005260:Female; D006801:Humans; D007124:Immunoenzyme Techniques; D008875:Middle Aged; D014134:Tracheal Neoplasms / Q000032:analysis / Q000648:ultrastructure*
chemical_list: D002272:Carcinoembryonic Antigen; D001839:Bombesin