25th July 2023

An 83 year old woman recently diagnosed with metastatic bowel cancer presents with flushing and diarrhoea.

An 83 year old woman recently diagnosed with metastatic bowel cancer presents with flushing and diarrhoea. Recently, she has also noticed a new brown scaly rash around her neck.

Which vitamin is she most likely deficient in?

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