[Fever in Cancer Patients].

Fever in cancer patients is a medical emergency until a severe infection has been ruled out. In case of neutropenia prompt diagnostic work-up should be paralleled by empiric antibiotic treatment. Underlying malignancy as well as treatments may impair immune response and thus pave the way for less virulent pathogens. So the spectrum of infections comprises both pathogens that cause disease in immunocompetent patients and a variety of rarer organisms. After collecting two pairs of blood cultures, broad-spectrum antibiotic treatment should commence within one to two hours. Depending on the individual patient's risk antimicrobial prophylaxis should be considered.