Types of lung carcinoma
- Adenocarcinoma is a malignant tumor originating in the epithelial cells of glandular tissue and forming glandular structures. This is common in the lung (forming 30-40% of all lung carcinomas). It is found peripherally, arising from goblet cells or type II pneumocytes.
- Squamous cell carcinoma due to squamous metaplasia. This accounts for 20-30 percent of lung tumors and is usually hilar in origin.
- Small cell carcinoma is almost certainly due to smoking. These metastasise early, and may secrete ADH (lowering patient sodium concentration).
- Large cell undifferentiated carcinomas account for 10-15 percent of lung neoplasms. These are aggressive and difficult to recognise due to the undifferentiated nature. These are most commonly central in the lung.
Further Reading
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