Description of the characteristics of aquagenic pruritus expressed by patients suffering from myeloproliferative neoplasms.

Prospective work based on the distribution of a dedicated questionnaire.

Patients with myeloproliferative neoplasms identified and followed in French Hospitals. Patients could be followed for polycythemia vera or essential thrombocythemia or primary myelofibrosis.

Distribution of the questionnaire to each patient with myeloproliferative neoplasm (treated or not) suffering from aquagenic pruritus.

Analyse of each characteristic of the aquagenic pruritus by a statistician and publication at the end.

Inclusion Criteria:

• Patients with one of three non-chromosomal Philadelphia-positive myeloproliferative neoplasms: polycythemia vera (PV), essential thrombocythemia (ET), and primary myelofibrosis (PMF).
• Suffering (or having suffered) from aquagenic pruritus.
• No age limit, but major
• Patient having formulated his non-opposition

Exclusion Criteria:

• Patients with MPN with non-aquagenic pruritus,
• Patients with another hematologic disease and aquagenic pruritus
• Patients unable to complete the questionnaire.
• Patients with physical or mental disabilities to formulate non-opposition
• Refusal of participation

Patients with one of three Philadelphia positive non-chromosome myeloproliferative neoplasms: polycythemia vera (PV), essential thrombocythemia (TE) or primary myelofibrosis (PMF).

And suffering (or having suffered) from aquagenic pruritus.

All collected data that underlie results in a publication

Data will be available beginning six months and ending five years following the publication

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