Infections in Patients with Acute Leukemia -- Infections in Patients with Malignant Lymphomas -- Consequences from specific treatment modalities -- Infections after high-dose chemotherapy and autologous hematopoietic stem cell transplantation -- Microbiological Background -- The Diagnostic Approach to the Febrile Neutropenic Patient: Clinical Considerations -- Diagnostic Radiology in Hematological Patients with Febrile Neutropenia -- Risk Stratification in Febrile Neutropenic Patients -- Fever of Unknown Origin: Treatment According to Risk Assessment -- Pulmonary Complications -- Vascular Catheter-Related Infections -- Gastrointestinal Complications -- Central Nervous System Infections -- Antibacterial Agents -- Antifungal Agents -- Antimicrobial Prophylaxis in Hematology -- Infection Control and Hospital Epidemiology in Hematology Units -- Myeloid Growth Factors.