RT Journal Article SR Electronic T1 Update in the myeloproliferative neoplasms JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP s66 OP s70 DO 10.7861/clinmedicine.14-6-s66 VO 14 IS Suppl 6 A1 Claire N Harrison A1 Mary F McMullin YR 2014 UL http://www.rcpjournals.org/content/14/Suppl_6/s66.abstract AB The differential diagnosis of haematological abnormalities, such as leucocytosis, erythocytosis, thrombocytosis or indeed anaemia, is wide and disarming. Here we report on significant updates in the differential diagnosis of erythrocyosis and thrombocytosis presenting a simplified schema for the clinician. We then move to discuss significant advances in this field which have followed a series of key molecular findings, most specifically those affecting the JAK/STAT pathway.