Distinction Risk of Severe Infection in Febrile Neutropenia After Chemotherapy

Inclusion Criteria: * Child aged 1 to 18 years * Child with hematology or cancer * Child with a febrile neutropenia post-chemotherapy * Child with social security * No opposition from the child and/or parents, in case of absence, the holder of the parental authority present, can consent, alone, to the participation of the unemancipated minor. Exclusion Criteria: * Febrile neutropenia at diagnosis of tumor disease * Child with palliative care * Child having had a hematopoietic stem cell allo-graft in the preceding year * Febrile neutropenia immediately post auto-transplant * Antibiotherapy prior to admission * Initial care in a non-investigative center.