there is a 1.3cm x 1.2cm low density nodule in the anterior mediastinum.the differential diagnosis include lymph ,small thymoma,or lesion.i have papillary carcinoma thyroid cancer with multiple tumors ranging at 1.3cm.i am having 1-131 cancer treatment done on jan,27,2012.i've had surgery done in 2010 of may,to remove my thyroid glands with a positive margin.i am concern about this mass near my heart.my name is marco camareno a cancer patient,a son,brother,husband,grandfather,friend but most of all a father with hope.i am only 36yrs old.