question: My friend David who will be 70 yrs old and is heart patient with stent - had a larger than 50 piece cyst on his sterum middle of chest. Of course he let it go tell inflamed red and some infection in center.  When he went to doctor - put him on sulfa type antibiotic but I saw yesterday and no change.  I am concerned because of the infection and its location near heart and lungs.  What should his next step be?  thanks Aggie