LUNG CANCER Flashcards
What are the two groups of lung cancer?
Primary
Pleural mesothelioma
What is primary lung cancer?
cancer starting in the lungs, carcinoma derived from epithelial
What is the pleura?
sheets of tissue covering the lungs to protect them
What is the pleural space?
gap between the pleura and membranes move over each other as we breathe in and out
What is a plural effusion?
build up of fluid due to the cancer cells irritating membranes
What is a pleural mesothelioma?
cancer starting in the pleura, cancer of mesothelial cells
What is the main cause of pleural mesothelioma?
asbestos
What is the cell type of pleural mesothelioma?
cuboidal or squamous
What are the symptoms of plural mesothelioma?
- chest pain
-fatigue
-shortness of breath
-persistent cough
-difficulty swallowing - FINGER CLUBBING
What is the survival rate of pleural mesothelioma?
1-2 years because of late diagnosis
What are the two types of primary lung cancer?
- small cell lung cancer
-non small cell lung cancer
What are the types of NSCLC?
- adenocarcinoma (most common)
- squamous cell
- large cell carcinoma
How does a NSCLC adenocarcinoma form?
develops from mucus making cells in the lining of the airways
How does a squamous NSCLC form?
develops from the flat, surface covering cells found near the centre of the lung in left or right bronchus
What are the two types of small cell lung cancer?
- small cell carcinoma
- combined small cell
What are the risk factors for lung cancer?
- smoking
- exposure to chemicals
- family history of lung cancer
What mutation is more common in non smokers?
EGFR
What drug inhibits the tyrosine domain of the EGFR mutation?
Gefinitib - binds to ATP binding site of EGFR tyrosine domain
What mutation is responsible for 12% of NSCLC cases?
KRAS - mutation prevents breakdown of GTP leaving KRAS in a permanent state
What is the main immunotherapy drug for lung cancer?
pembrolizumab - blocks PD-L1 pathway
What is the survival rate for small tumours that have not spread?
90%
What is the overall survival rate for all types of lung cancers?
22.9%
What type of primary lung cancer spreads quicker?
small cell lung cancer
What are the two types of lung cancer?
- Primary
- pleural mesothelioma