The incidence of anemia ranges from 20 to 75% depending on the type of cancer. It is often present at diagnosis and increases with specific treatments. It has an impact on overall survival and quality of life. Its origins are multiple (pure iron deficiency or functional, malnutrition, dyserythropoiesis, insufficiency renal, hemolysis, chemotherapy, radiotherapy, targeted therapies).

Transfusion is the most common treatment offered in the management of anemia. The incidence of anemia and its consequences are often underestimated during cancer management.

Recommendations were published in 2012. An inventory of the incidence of anemia before and after the publication of these recommendations are proposed in order to assess their impact on daily practice.

Inclusion Criteria:

• Age ≥ 18 years old,
• Follow-up for cancer justifying hospitalization,
• Presenting anemia defined by a hemoglobin level <11 g / dL,
• Patient not having objected to the collection of his data after oral and written information.

Exclusion Criteria:

• patients with a hemoglobin level ≥ 11 g / dL,
• adult patients under guardianship, curatorship or deprived of liberty,
• pregnancy or breast-feeding in progress at the time of hospitalization.

Adult patients with cancer and justifying continuous hospitalization for more than one night regardless of pattern.

Patient informed and not having expressed opposition to the study.