 In 50% of cases, an infection is detectable; bacteremia (bacteria in the bloodstream) is present in approximately 20% of all patients with this condition.Febrile neutropenia can develop in any form of neutropenia, but is most generally recognized as a complication of chemotherapy when it is myelosuppressive (suppresses the bone marrow from producing blood cells).The Multinational Association for Supportive Care in Cancer (MASCC) risk index can be used to identify low-risk patients (score ≥21 points) for serious complications of febrile neutropenia (including death, intensive care unit admission, confusion, cardiac complications, respiratory failure, kidney failure, low blood pressure, bleeding, and other serious medical complications).