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Arguments for a histogenetic classification of lung carcinomas
Morphologie Et Embryologie
|October 1, 1981
Summary
Lung carcinomas originate from basal-intermediate cells and develop in phases. Chemical carcinogens initiate changes, leading to diverse tumor types like macrocellular, cylindrocubic, and epidermoid carcinomas.
Area of Science:
- Oncology
- Cell Biology
- Pathology
Background:
- Lung carcinomas arise from basal-intermediate cells of bronchial and bronchiolar epithelia.
- Tumor development occurs in at least two distinct phases.
- These cells retain the capacity for division and differentiation under various stimuli.
Purpose of the Study:
- To discuss the primary histogenetic characteristics of lung carcinomas.
- To explore the influence of promoting factors on tumor development.
- To detail the varied cellular changes induced by carcinogens.
Main Methods:
- Histogenetic analysis of lung carcinoma development.
- Examination of cellular changes induced by chemical carcinogens.
- Correlation of cellular differentiation and metaplasia with tumor types.
Main Results:
- Chemical carcinogens initiate changes in proliferating cell foci.
- Promoting factors influence the proliferation of transformed cells.
- Cellular changes lead to poorly differentiated (macrocellular), cylindrocubic, or metaplastic (epidermoid) carcinomas.
- Inclusion of Kultschitzky-APUD cells results in carcinoids or microcellular carcinomas.
Conclusions:
- Lung carcinoma histogenesis is linked to the differentiation potential of basal-intermediate cells.
- Tumor type is determined by the degree of cellular change and metaplasia.
- Specific cell types and differentiation pathways dictate the final carcinoma morphology.