The primary study goal is to identify whether a level of procalcitonin exists above which rates of bacteremia or serious bacterial infections in patients with fever and a central line exist. The investigators will try to determine if levels of PCT correlate with bacterial infection in line sepsis in the specific population of patients who most often have a central line secondary to an oncologic process. The investigators proposed this theory since peak values of PCT have been shown to be elevated in acute settings making it a useful tool in this particular population.