1st August 2023

A 55-year-old man with a background of multiple myeloma has recently returned from a holiday abroad in the USA.

A 55-year-old man with a background of multiple myeloma has recently returned from a holiday abroad in the USA. He has recently completed a course of chemotherapy. Since the last few days of his holiday, he has had a productive cough of dark brown sputum and reduced exercise tolerance. Whilst on holiday, he spent most of his time fishing for river throat with his brother.

What is the most likely diagnosis?

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