<s>[INST] Hi, my nan has be diagnosed with lung cancer and this past week has been vomiting more and has said that it is brown in colour. I am just wondering if we should be concerned that she is deteriorating quicker than what we estimated, my nan is currently 88 years old and is a slim built lady [/INST] Dear sir. kindly look at the colour personally n quantity. if reddish like a blood n more quantity kindly meet the pulmonologist immediately. if not some times the blood tinge swallowed with come out as brownish. but if it's more. kindly meet the doc. </s>