Lung cancer Flashcards
Epidemiology of lung cancer - how common is it, what is the prognosis like?
Lung cancer is the 3rd most common lung cancer in the UK. More common in men than women.
It contributes to 21% of all cancer deaths and the 5 year survival rate is 10%.
Where in the lungs to the tumours most commonly occur?
The epithelium of the large and medium bronchi
What are the risk factors for lung cancer?
- Genetic predisposition
- Cigarette smoking
- Deprivation and living circumstances
- Increasing/advanced age
- History of COPD
- Exposure to asbestos, chromium and arsenic and iron oxide
When is a patient sent for a 2 week wait urgent referral?
- over 40 y/o with unexplained haemoptysis
- chest x-ray
- strong clinical suspicion of lung cancer from history e.g. weight loss alongside haemoptysis
What investigations can be used to confirm diagnosis of lung cancer?
- Chest X ray
- CT chest and upper abdomen
- PET scan for metastases
- Bronchoscopy (biopsy)
- Tumour markers
- Pulmonary function tests
- Cardiopulmonary exercise testing
Small cell lung cancer - what are the risk factors/who is the typical patient?
Older patients who has a significant smoking history +/ COPD
What are the 2 Types of lung cancers?
- Non small cell lung cancer (adenocarcinoma, squamous cell and large cell)
- Small cell lung cancer
How common is small cell LC?
15% of lung cancers
Prognosis for small cell LC?
Highly aggressive, rapid growing and usually metastasised to become inoperable before diagnosis
What neoplastic syndromes is small call lung cancer associated with?
- SIADH
- Cushing’s
- Lambert Eaton syndrome
- Myasthenia Gravis
- Hypercalcaemia
- Hypertrophic Pulmonary Osteoarthropathy
Management of small cell lung cancer
- Chemotherapy and radiotherapy
- Surgery is not appropriate because the tumour type has a very fast doubling time
- Brain and chest radiotherapy can be used to reduce risk of metastases
- Often relapse quickly after chemotherapy so prognosis is short
Adenocarcinoma of the lung - who gets it?
a. Women
b. Non smokers
Where are adenocarcinoma tumours most often located?
Peripherally located in the lung
Commonly invade the pleura
What are the typical features and clinical presentation of squamous cell carcinoma of the lungs?
- Tumour is centrally close to bronchi
- Associated with cigarette smoking
- Hypercalcaemia associated as tumour can secrete PTH
- Digital clubbing common
- Neoplastic syndrome Hypertrophic Pulmonary Osteoarthropathy
Which genes are associated with Adenocarcinoma of the lung?
EGFR and ALK