PET Scan Results

I just got off the telephone with my Medical Oncologist (Dr. Sherman) and he said the PET scan was essentially clean, but there was an area of concern under my left arm. I told him that the left side is where my catheter was inserted and also was the site of my lymphectomy. He says they are aware of this and that it sems to be separate from these things. So what happens now? Now Dr. Sherman is going to order an MRI of my left arm so I will get a phone call from someone to schedule the MRI. My first chemotherapy appointment will be on March 30th, so Dr. Sherman says to make sure it is done before that date.