This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory, Subject name: Medicine
The chest CT scan given below shows the presence of 
Select and explain. 
A. Pneumatocele, B. Bronchiectasis, C. Normal scan, D. Lung cancer
B: Bronchiectasis
Answer: B: Bronchiectasis 
Explanation: Ans. B. Bronchiectasisa. Above CT scan shows-i. Cystic dilation of large airwaysii. Peribronchial thickeningiii. Signet ring sign is seenb. Pneumatocele are cystic cavities seen in Staph aureus pneumonia.c. Lung cancer is easily ruled out as there is no focal swelling.