Evaluation of Event free survival in patients with triple-negative thrombocytosis

Patients with non-reactive thrombocytosis, explored at least by bone marrow biopsy and NGS panel will be included. Clinical and biological characteristics as well as evolution will be recorded retrospectively.

Inclusion Criteria:

• Patients with non reactive thrombocytosis for at least 6 months
• availability of bone marrow biopsy and NGS panel

Exclusion Criteria:

• Unable to consent

Patients followed by hematologists of the French Intergroup of MPN

All collected data that underlie results in a publication

Data will be available beginning three years and ending fifteen years following the final study report completion

Data access requests will be reviewed by the internal committee of Brest UH. Requestors will be required to sign and complete a data access agreement