Three Cases of Papillary Adenocarcinoma of the Lung Originating in the Central Bronchi and Showing Intraluminal Polypoid Growth

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Three cases of differentiated papillary adenocarcinoma otiginating in the large bronchi of the 2nd to 6th orders and proliferating in a medial direction intraluminally along the bronchial surface are presented.<BR>Light microscopically, these tumors were composed of cuboidal cells but free of fibrotic foci, scars and psammoma bodyies.<BR>Electron microscopically endoplasmic reticulum, abundunt mitochondria and oval granules of the varying sizes with varying electron densities were noted, in 2 of the cases. But no mucous granules were observed.<BR>Histogenetically, the 3 cases seemed to have originated in the bronchial surface epithelium.
特定非営利活動法人日本肺癌学会の論文