article_snippet: The type of hormone produced varies significantly, but tumours in the lungs tend to produce either ACTH, which regulates production of the stress hormone cortisol, or serotonin, which can affect gut function, mood and the dilation of blood vessels.
article_snippet: If tumours produce serotonin, this causes flushing, diarrhoea and wheezing.
article_snippet: In around 20 per cent of cases, these vague symptoms are detected either at A&E, as the patient has become very ill, or by chance when these vague symptoms go for a routine health check,' Catherine Bouvier of the Net Patient Foundation says.
article_snippet: Patients get infection-type symptoms, such as a cough, coughing up blood or wheezing.
article_snippet: The difficulty is, some of similar symptoms also occur with other conditions, such as asthma,' says Professor Prowse.
article_snippet: At first, it was great as it stopped my other symptoms such as an upset stomach.