 [ Symptoms ] i am ill for two years with gastro issues sweating weight loss thick phlegm [ Disease ] com the symptoms you stated are common in many cases so it is not necessarily a tumor taking about 2 years for a tumor to stay invisible in ct does not make sense please state how many kilograms have you lost in a year are you a smoker is there any other symptom describe your gastric issues these symptoms may be due to gerd reflux disease hiatal hernia and bronchitis …and cystic fibrosis and others where do u live also…