Lung Tumours

Normal Respiratory Epithelium

- Ciliated columnar cells
- Goblet mucin-producing cells
- Kulchitsky cells (diffuse/dispersed endocrine system)
- Reserve Cells (stem cells)

Tumour-Like Lesions
Pulmonary Hamartoma
Developmental disorder of cell growth - excessive growth of normal cells & tissues at a site

1ry Tumours
Lymphoid
Lymphoma
Epithelial
Benign - Bronchial Adenoma
Borderline - Carcinoid
Malignant - Bronchogenic Carcinoma
Connective Tissue

Benign - Leiomyoma/Lipoma
Malignant - Leiomyosarcoma/Liposarcoma

2ry tumours
Metastasis

Epithelial
Connective Tissue
Lymphoid

Benign Tumours
Well-circumscribed
*single masses of 1 cell type

Well-differentiated
Little cytological atypia