Despite its high prevalence, a recent study conducted by Prof. Cacoub (unpublished) on the french national health insurance database showed that iron deficiency was an underdiagnosed and under-treated co-morbidity. In inflammatory situations, especially during cancer, the measurement of the transferrin saturation factor is only performed in about 10% of cases whereas this measure is recommended in inflammatory situations including cancer (French Health High Authority 2011)

Inclusion Criteria:

• Patient, male or female, over the age of 18
• Patient in an oncology department (any type of tumor, any type of treatment, initiated or not)
• Patient affiliated or beneficiary of a social security system
• Patient with written consent

Exclusion Criteria:

• Protected patient: major under guardianship, curatorship or other legal protection, deprived of liberty by judicial or administrative decision
• Patient hospitalized without consent