title: [Epidermoid bronchial cancer induced by radiotherapy].
abstract: The occurrence is reported of a bronchial epidermoid cancer appearing 13 years after irradiation for an intra-thoracic paraganglioma. Four criteria are required when considering the carcinogenic effects of radiation: a documented history or irradiation, a latent period of 8 to 20 years, histological evidence of the development of a malign tumor within the irradiated zone and a different histological type from that of the primary tumor. All these criteria are satisfied in this case. The occurrence of post radiation fibrosis and the knowledge of a cancer developing in primary or secondary pulmonary fibrosis are considered in discussing carcinogenesis. Radiation induces fibrous and an oncogenic mutation which by the secretion of certain proteins, notably a growth factor, favours the development of a cancer.
mesh_terms: D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D001984:Bronchial Neoplasms / Q000175:diagnosis / Q000209:etiology* / Q000628:therapy; D006801:Humans; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D009381:Neoplasms, Radiation-Induced / Q000175:diagnosis / Q000628:therapy; D010235:Paraganglioma / Q000532:radiotherapy; D013899:Thoracic Neoplasms / Q000532:radiotherapy
vernacular_title: Cancer bronchique épidermoïde induit par la radiothérapie.