Position statement on the diagnosis and management of acute leukaemia and aggressive lymphomas in pregnancy.

Haematological malignancies affect 12·5 in 100 000 pregnancies. Over the past two decades, the number of haematological malignancies in pregnancy has substantially increased. Life-threatening haematological malignancies in pregnancy, such as acute leukaemia and aggressive lymphomas, pose a unique therapeutic challenge: clinicians must consider both maternal and fetal wellbeing, aiming to deliver optimal curative therapy for the patient and a successful pregnancy outcome. A multidisciplinary approach to disease management is paramount, and there are currently no clinical practice guidelines available. An Australasian working group, including representatives from haematology, obstetric medicine, clinical teratology, radiology, nuclear medicine, maternal-fetal medicine, and a patient representative, was established to develop this position statement, which is based on a combination of current evidence and expert consensus. We provide recommendations for diagnosis and staging, imaging safety in pregnancy, therapy in pregnancy incorporating a multidisciplinary approach, supportive care, oncofertility, and pregnancy and birth management. This Viewpoint was reviewed and endorsed by the councils of the Society of Obstetric Medicine of Australia and New Zealand, the Haematology Society of Australia and New Zealand, and the Haematology in Obstetric and Women's Health Collaborative.