title: Oncocytic carcinoid tumor of the lung.
abstract: A case of bronchial carcinoid tumor is reported in which a marked degree of transformation to mitochondrion-rich cells (oncocytes) was present. Ultrastructural observations demonstrated a transition between the two cell types, and revealed an alteration in mitochondria suggestive of a degenerative change in these organelles.
mesh_terms: D002282:Adenocarcinoma, Bronchiolo-Alveolar / Q000648:ultrastructure*; D002471:Cell Transformation, Neoplastic / Q000648:ultrastructure; D003594:Cytoplasmic Granules / Q000648:ultrastructure; D006801:Humans; D008175:Lung Neoplasms / Q000648:ultrastructure*; D008875:Middle Aged; D008928:Mitochondria / Q000648:ultrastructure