1 Tree in bud

Q. Most common cause of tree in bud appearance on HRCT chest is?
a. Endobronchial spread TB
b. Haematogenously spread TB
c. Pneumocystis Carnii
d. RSV

Ans : A.. endobronchial spread TB

NOTE: similar ques was asked in aiims nov. 2010 where the difference was that the patient had undergone bone marrow transplant and then showed this Tree In Bud appearance, so then the answer will be Pneumocystis carnii.

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