Primary Lung Tumours
- 90% are carcinomas
- Non-small cell carcinoma 85%
- squamous cell carcinoma 20%
- adenocarcinoma 30%
- large cell carcinoma 10%
- Small cell 15%
Main morphological difference between the two is nuclear characteristics and amount of cytoplasm. Small cell “always” smoking
Squamous cell
- Presence of keratinization +/- intercellular bridges
Adenocarcinoma
- Mucin production +/- gland formation
Small cell
- Don’t produce keratin or mucin
Secondary Lung Tumours
- More common than primary
- Multiple discrete nodules
- Most commonly from breast, GIT, kidney
- Sarcomas
- Melanomas
- Lymphomas