Myeloproliferative neoplasms (MPN) are disorders that affect how the body produces red blood cells, white blood cells, and platelets.

Every day, our bodies create billions of blood cells - red blood cells (RBCs) to carry oxygen round the body, white blood cells (WBCs) to fight infections, and platelets to make the blood clot when we cut ourselves. These blood cells are produced from stem cells inside the bone marrow which grow and mature into blood cells. Usually the stem cells mature into blood cells in a very tightly-regulated way, under the control of a number of chemicals (hormones) in the blood stream. This ensures that we have just the right number of RBCs, WBCs and platelets.

Patient contact

Other contact information

For all general & GP enquires regarding myelodysplastic syndrome (MDS) please contact the MPN admin team on 0203 447 7101.

If you are a patient please call the Patient Telephone Line for all queries to your team: 0203 447 7359. Please note the line is open Monday to Friday 9am-5pm.

Outside of the office hours (listed above) and for urgent medical advice only, patients may call the haematology ward: 07852 220 900.

Please note this line is for patients only – medical professionals should call the general enquiries line for any patient related queries.


Myeloproliferative neoplasms (MPN)
University College Hospital Macmillan Cancer Centre
Outpatient clinics and haematology daycare unit:
Ground Floor
Huntley Street
London, WC1E 6AG

Inpatient Wards:
T13 North, T14 South, T16 South and T16 North
Euston Road
London, NW1 2PG

Referral address

Department of Haematology 
3rd Floor West
250 Euston Road 
London, NW1 2PG