This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
A patient underwent lung transplantation.  Below is the gross appearnce of the PM lung.  What could be your possible diagnosis? 
Select and explain. 
A. Bronchiectasis, B. Lung abscess, C. Lung carcinoma, D. Miliary tuberculosis
D: Miliary tuberculosis
Answer: D: Miliary tuberculosis 
Explanation: Ref. Robbins Pathology. 9th edition. Page 371
Miliary Tuberculosis

When the immune response is poor or is overwhelmed by an extensive infection, then it is possible to see the gross pattern of granulomatous disease seen here.
This is a "miliary" pattern of granulomas because there are a multitude of small tan granulomas, about 2 to 4 mm in size, scattered throughout the lung parenchyma.
The miliary pattern gets its name from the resemblence of the granulomas to millet seeds.