17th February 2025

A 56-year-old male is admitted to hospital with shortness of breath and cough for the previous 4 days.

A 56-year-old male is admitted to hospital with shortness of breath and cough for the previous 4 days. On examination, he has bilateral crackles on his chest.

Observations are as follows: respiratory rate 22.

His blood tests show a lymphopenia. 

CT findings are as follows:

What is the likely diagnosis?

Select the SINGLE most appropriate option from the list below. Select ONE option only.