Neutropenic Fever 101

Neutropenic fever represents a critical oncologic emergency, defined by an oral temperature of at least 100.4°F and an absolute neutrophil count below 500. Because neutropenic patients lack the white blood cells necessary to mount a traditional inflammatory response, fever serves as the primary indicator of infection. Management requires immediate initiation of broad-spectrum anti-pseudomonal beta-lactams, while vancomycin usage should be restricted to patients meeting specific criteria like hemodynamic instability or known MRSA colonization to prevent resistance. High-risk patients, particularly those with hematologic malignancies, benefit from prophylactic levofloxacin. Clinical monitoring should prioritize patient-specific risk factors and avoid interventions like rectal exams or scheduled antipyretics that mask symptoms. Emerging evidence suggests that antibiotic therapy may potentially be discontinued once a patient becomes afebrile, regardless of neutrophil recovery, though institutional protocols remain the standard for clinical decision-making.