A 56-year-old man is referred to a pulmonologist for evaluation of a left lung upper lobe infiltrate. Approximately 10 months earlier, he was treated for pneumonia of the left lung. However, he ...

A 69-year-old woman with breast cancer presents to hospital in Beirut to receive her first post-mastectomy chemotherapy session. She notes that in the past 6 months, she has received neoadjuvant ...

The case description for a Case Records of the Massachusetts General Hospital appears below. What is the diagnosis? What diagnostic test is most likely to be helpful? Cast your vote on the diagnosis ...