 [ Symptoms ] 3 year oldcough for 6 weeks 3 year old started with walking pneumonia to clinical pneumonia to sinusitis to acute bronchitis she has been on 2 different types of antibiotics and has finished them she finished her last dose of antibiotics last tue and since thurs she has has a constant cough again she does not have a runny nose and she does not say anything hurts except her throat her doctor says she is coughing due to the remaining bronchitis but i am thinking it may be something else any suggestions would be great [ Disease ] the doctor starts by asking questions about your symptoms and taking a personal and family health history then he or she performs a physical exam including a neurological exam if there is reason to suspect a brain tumor the doctor may request one or more of the following tests scanning tests such as a ct cat scan or mri to see detailed images of the brain angiogram which involves the use of dye and x rays of blood vessels in the brain to look for signs of blockage spinal tap which examines fluid taken from the spinal cord the doctor may also ask for a biopsy to determine whether or not the tumor is cancer a tissue sample is removed from the brain either during surgery to remove the tumor or with a needle inserted through a small hole drilled into the skull before treatment is started the sample is then sent to a laboratory to see if there is any cancer present