I hope medical students reading this will practice what has been learned in medical student years.
This is a clear cut case of Ca lung with metastasis to the brain.
What I would like to stress here is - Do not forget the causes of clubbing !
Respiratory :
Ca lung
Pulmonary fibrosis
Bronchiectasis
Chronic suppurative lung diseases
Cystic fibrosis
CVS :
Congenital cyanotic heart disease
Eisenmenger syndrome
Infective endocarditis
GI :
Chronic liver disease (Cirrhosis)
Inflammatory bowel disease
Thyrotoxicosis (pseudoclubbing - acropachy)