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Laboratory Test Reference Guide

Laboratory Information

Test Name


Specimen Collection

Pre Testing Requirements

A dedicated blood tube is always required.

Adult Specimen

1x EDTA (purple) dedicated to test (only one tube needed for JAK2/CALR/MPL testing)

Test Information


Molecular Biology

Test Availability

Mon - Fri, 0800 - 1630 excl. Public Holidays

Laboratory Turnaround Time

14 days



Diagnostic Use Or Instructions

Do not test for JAK2 mutations without first consulting with a Haematologist.

JAK2 mutations are associated with the myeloproliferative disorders; polycythaemia vera (PV), essential thrombocythaemia (ET) and myelofibrosis. Testing may be indicated in the presence of sustained erythrocytosis (Hb > ULN) and/or thrombocytosis (platelets >600) if not explained by other causes (for example chronic hypoxia, inflammation). Venous thrombosis (particularly mesenteric) is occasionally associated with these conditions.

Referred Out

Referred to CHL

Referred Test