title: [Present status of granular cell tumors. Apropos of 8 new cases with tracheobronchial localization].
abstract: The authors report 8 new cases of granular cell tumour of Abrikossoff's tumour located in the trachea or bronchus. After briefly recalling the generally accepted features of this disease, they report several new aspects: the obviously under-estimated frequency, the absence of progression, requiring therapeutic abstention and regular follow-up, the epidemiological problems posed by the association with chronic bronchitis or the coexistence with a malignant bronchial tumour, the uncertainties which still surround the histogenesis, which is partly mesenchymal and partly nervous tissue, more particularly Schwann cells, which can be supported by ultrastructural arguments.
mesh_terms: D000328:Adult; D000368:Aged; D001984:Bronchial Neoplasms / Q000175:diagnosis / Q000209:etiology* / Q000628:therapy / Q000648:ultrastructure; D001991:Bronchitis / Q000150:complications; D001999:Bronchoscopy; D005336:Fiber Optic Technology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary / Q000453:epidemiology; D009379:Neoplasms, Muscle Tissue / Q000175:diagnosis / Q000209:etiology* / Q000628:therapy / Q000648:ultrastructure; D014134:Tracheal Neoplasms / Q000175:diagnosis / Q000209:etiology* / Q000628:therapy / Q000648:ultrastructure
vernacular_title: Actualité des tumeurs à cellules granuleuses. A propos de 8 nouvelles observations de localisation trachéo-bronchique.