### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
hi sir this is praveen kumar from hyderabad,sir my father has been suffering from cough since 7 months , now the doctors are telling it is fourth stage of  cancer , this salivation is a bit help less  position , but we can try , still they are not starting Any treatment for my dad , still they are planing to do one more time biopsy test from throat to lungs for my dad , before biopsy test my father was very healthy now he is getting some pain int he chest  so if  they do again and again this test, my father may got nervous  and become dull  so i am not getting what to do right now .present problems1) cough (since 7 months) 2) throat to near left hear pain 3) after biopsy he is getting pain in the chest and he is not getting  blood   vomiting , he is very  active like a normal person , E.N.T.  also said  no problem in the throat ,   my father is not smoker, not a drinker , even he wont drink tea sir please help my family  we have no other expect my father , my  parents both are blind  please suggest me what i have to do now ,

### output:

Hi, Thanks for writing in. Any cough in a patient that is present for more than two months and is not responding to treatment is a sign of chronic disease. In India such non resolving cough is likely to be due to tuberculosis or cancer unless proven otherwise. The first step in evaluating such a condition is by doing an X-ray chest and looking for any signs of disease. If there is any suspicious area then it requires that a CT scan of chest be done. This is a detailed investigation and shows problem areas which are small in detail. Any finding in X-ray or CT scan should be evaluated further by doing tests like bronchoscopy or biopsy if required. Confirmation of diagnosis whether it is TB, cancer or anything else is certain after doing a biopsy. Since you have got a biopsy done for your father, you have to wait for the report to know final diagnosis. Biopsy is a skilled technique and if the area of biopsy is small or the cells have not come properly then repeat test is required. Please get an X-ray done if your father still complains of chest pain after the biopsy. Any complications of biopsy need to be ruled out. Please do not worry.