I have a 'lump' in my head behind my right ear and some smaller ones down the side of my neck. The lump in my head has grown over the last week and creates pain at times. My doctor checked and mentioned 'lympoadenopathy'. She requested a blood test of CBC w/diff. Of course I'm not sure what all of this means but I want to know if this is related to lymphoma and what exactly is lymphoadenopathy?