A 32-year-old man presented with a subacute onset of fever, a dry cough, and gradually worsening dyspnea. Medical history The patient had a medical history of HIV infection with an indefinite CD4 count three years ago. Similarly, he was on antiretroviral therapy ten months ago and recently discontinued the treatment. Examination Chest X-ray: Presence of diffuse bilateral pulmonary infiltrates He was tachypneic and hypoxemic.

The patient was immunosuppressed and had oral thrush. Leukocyte count: 2800 cells/mm 3 LDH level: 540 IU/L What are the most likely diagnosis and next steps of management? (Answer is posted in the comment section below!) *This case is from the Docplexus editorial team for educative purposes only. Source: Case Files Internal Medicine