<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, Ive been having some breathing problems and my lymph nodes have been swollen. I also feel very fatigued most of the time.  <response>: Based on your symptoms, we need to run some tests to determine if you have sarcoidosis. Well start with a complete blood count CBC to check your red and white blood cells, as well as a hematology test. Well also need to do a radiographic imaging procedure, such as an x-ray or MRI, to get a closer look at your lungs and lymph nodes. In addition, we will perform a complete physical skin exam, and an electrocardiogram to check your heart function. 