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Dr. Catherine M Flynn
Clinical Senior Lecturer, Haematology
Clinical Senior Lecturer, School Office - Medicine


Dr Catherine Flynn graduated from Medicine at Queens University Belfast in 1995 (M.B.,BCh.B.A.O). She completed internal medicine training (Belfast City Hospital Training Scheme), gaining membership of the Royal College of Physicians, Edinburgh in 1998 (MRCP(Edin)). She moved to Dublin where she completed higher speciality training in haematology in 2004 and obtained membership of the Royal College of Pathologists, London (FRCPath). Her haematology training took place in Ireland and later at the University of Minnesota, in Minneapolis, USA where she completed a 3-year fellowship in stem cell transplantation. She was awarded a doctorate of medicine (MD) from Queen's University Belfast in 2008 for post graduate research performed in Minneapolis and completed at Katholieke Universiteit Leuven, Belgium under the mentorship of Professor Catherine Verfaillie.

She returned to Dublin in 2007 to take up an appointment of consultant haematologist at St James's Hospital Dublin including the national bone marrow transplant unit and Coombe Women and Infant's University Hospital where she works at present. While in this position, she has been the National Specialist Director for higher specialist training in haematology (2011-2014) and continues to have an active interest in post graduate training and education.

Dr Catherine Flynn's active clinical and research interests include myeloid malignancies and bone marrow failure syndromes including paroxysmal nocturnal haemoglobinuria (PNH). She is a clinical and academic lead in the field of stem cell transplantation and in 2021 was appointed national lead for the stem cell transplant program at St James's Hospital.

Dr Flynn is a member of the NCCP myeloid and cytogenetics subgroups and co-organiser of the Acute Leukaemia forum annual meeting for the past 10 years. She has been a Principle Investigator (PI) for several clinical trials and currently is the National PI for the HOVON AML 150 study recently launched in Ireland, National PI for a Pharmaceutical trial examining a biosimilar (ABP 959) in PNH and Co-PI for a pharma sponsored trial in ruxilotininb refractory myelofibrosis (Freedom -2).

Simultaneously, Dr Flynn has an interest in the field of maternal health and haematological diseases in pregnancy. She has published on the presentation of rare diseases in pregnancy and has a research interest in thrombocytopenia in pregnancy and the continued public health problem of iron deficiency in women of childbearing age. She has represented and discussed haematology related concerns to HSE led national interest groups during the introduction of the legislation for termination of pregnancy and transfusion in massive post-partum haemorrhage.

Publications and Further Research Outputs

Peer-Reviewed Publications

Andrea Bacigalupo 1, Gérard Socié, Hubert Schrezenmeier, Andre Tichelli, Anna Locasciulli, Monika Fuehrer, Antonio M Risitano, Carlo Dufour, Jakob R Passweg, Rosi Oneto, Mahmoud Aljurf, Catherine Flynn, Valerie Mialou, Rose Marie Hamladji, Judith C W Marsh, Aplastic Anemia Working Party of the European Group for Blood and Marrow Transplantation (WPSAA-EBMT), Bone marrow versus peripheral blood as the stem cell source for sibling transplants in acquired aplastic anemia: survival advantage for bone marrow in all age groups, Haematologica, 97, (8), 2012, p1142- Journal Article, 2012

Flynn CM, Kaufman DS., Donor cell leukemia: insight into cancer stem cells and the stem cell niche., Blood, 109, (7), 2007, p2688 - 2692 Journal Article, 2007

Corbett JM, Hawthorne I, Dunbar H, Coulter I, Chonghaile MN, Flynn CM, English K, Cyclosporine A and IFNγ licencing enhances human mesenchymal stromal cell potency in a humanised mouse model of acute graft versus host disease., Stem Cell Research & Therapy, 12, 2021, p238- Journal Article, 2021

Ahmed S, Harrity C, Johnson S, Varadkar S, McMorrow S, Fanning R, Flynn CM, O' Riordan JM, Byrne BM., The efficacy of fibrinogen concentrate compared with cryoprecipitate in major obstetric haemorrhage--an observational study., Transfusion Medicine, 22, (5), 2012, p344 - 349 Journal Article, 2012

Fortune AF, Kelly K, Sargent J, O'Brien D, Quinn F, Chadwick N, Flynn C, Conneally E, Browne P, Crotty GM, Thornton P, Vandenberghe E, Large granular lymphocyte leukemia: natural history and response to treatment., Leukemia & Lymphoma, 51, (5), 2010, p839 - 845 Journal Article, 2010

Langabeer SE, O'Brien D, Liptrot S, Flynn CM, Hayden PJ, Conneally E, Browne PV, Vandenberghe E, Correlation of the BRAF V600E mutation in hairy cell leukaemia with morphology, cytochemistry and immunophenotype., International Journal of laboratory Hematology, 34, (4), 2012, p417-21 Journal Article, 2012

Flynn CM, Hirsch B, Defor T, Barker JN, Miller JS, Wagner JE, Blazar BR, Burns LJ, Macmillan ML, Arora M, Weisdorf D., Reduced intensity compared with high dose conditioning for allotransplantation in acute myeloid leukemia and myelodysplastic syndrome: a comparative clinical analysis., American Journal of Haematology, 82, (10), 2007, p867 - 872 Journal Article, 2007

Eckfeldt CE, Mendenhall EM, Flynn CM, Wang TF, Pickart MA, Grindle SM, Ekker SC, Verfaillie CM., Functional analysis of human hematopoietic stem cell gene expression using zebrafish., PLOS Biology, 3, (8), 2005 Journal Article, 2005

Kaysie L Banton, Jonathan D'Cunha, Noel Laudi, Catherine Flynn, Dale Hammerschmidt, Abhinav Humar, Timothy Sielaff, Postoperative severe microangiopathic hemolytic anemia associated with a giant hepatic cavernous hemangioma, Journal of gastrointestinal surgery, 9, (5), 2005, p679 - 685 Journal Article, 2005

Catherine Flynn & Helen Enright, Fortification of Foods with Folic Acid, New England Journal of Medicine, 343, 2000, p970 - 972 Journal Article, 2000

O M Cormack, F Guilfoyle, C M Flynn., The prevalence of an elevated F cell population in a maternal and gynaecology cohort, Transfusion Medicine, 29, (5), 2019, p369 - 373 Journal Article, 2019

O'Kane G, Bracken-Clarke D, Gardiner N, Lee G, Ni Chonghaile M, Power D, Daly PA, McCaffrey J, Bacon CL, Conneally E, Flynn C, Vandenberghe E, Kennedy MJ, Browne PV, O'Donnell DM, Hayden PJ, A single-centre analysis of 30 patients with relapsed germ cell tumours treated with the TI-CE regimen., 2016 Journal Article, 2016

Shackleton L, Langabeer SE, O'Brien D, McCarron SL, Byrne B, Barry R, Flavin R, Bacon CL, Flynn CM., Hairy Cell Leukemia Masquerading as Pancytopenia in Pregnancy., Case reports in hematology, 2019, 2019, p3238168 Journal Article, 2019 DOI

Langabeer SE, Haslam K, Flynn CM., Isolated erythrocytosis associated with a CALR mutation., 66, 2017 Journal Article, 2017

Haslam K, Conneally E, Flynn CM, Cahill MR, Gilligan O, O'Shea D, Langabeer SE., CALR mutation profile in Irish patients with myeloproliferative neoplasms., Hematology/Oncology and Stem Cell Therapy, 2016 Journal Article, 2016

Johnson SN, Khalid S, Varadkar S, Fleming J, Fanning R, Flynn CM, Byrne B, Quality of care in the management of major obstetric haemorrhage, Irish Medical Journal, 2011, p119 - 121 Journal Article, 2011

O'Brien DA, Flynn CM, Chuk P, Gorman C, Wild B, Browne PV, Haemoglobin Etobicoke, an incidental finding in an Irish diabetic., Clinical and laboratory haematology, 25, (4), 2003, p259-62 Journal Article, 2003

Langabeer SE, Conneally E, Flynn CM., Myelodysplastic Syndrome/Acute Myeloid Leukemia Arising in Idiopathic Erythrocytosis., Case Reports in Haematology, (Feb 22), 2018 Journal Article, 2018

Haslam K, Chadwick N, Kelly J, Browne P, Vandenberghe E, Flynn C, Conneally E, Langabeer SE, Incidence and significance of FLT3-ITD and NPM1 mutations in patients with normal karyotype acute myeloid leukaemia., Irish journal of medical science, 179, (4), 2010, p507-10 Journal Article, 2010

Manal Abduljali, Dearbhla Doherty, Marthinus Dicks, Catherine Flynn, Catherine Maher, Brian Mehigan, Richard Flavin, Evaluation of the risk factors for venous thromboembolism post splenectomy-a 10-year retrospective study in St. James's Hospital, 3, 2019, pAB081 Journal Article, 2019 DOI

Laura Kearney, Lisa Lee Tokar, Catherine Flynn, Vitaliy Mykytiv, Karen Murphy, Stephen Langabeer , Repeat JAK2 V617F testing in patients with suspected essential thrombocythaemia, Journal of Clinical Pathology, 73, (11), 2020, p772- Journal Article, 2020


Catherine Flynn, "Abnormal Liver Function tests" during transplant.", European Bone Marrow Transplant Meeting, Geneva, 1-4 April , 2012, EBMT Invited Talk, 2012

Non-Peer-Reviewed Publications

Cellular Biology of Hematopoesis in, editor(s)Frederick R.Appelbaum, Stephen J.Forman,Robert S.Negrin, Karl G.Blume , Thomas' Hematopoietic Cell TransplantationF, Wiley-Blackwell, 2009, pp7287 - [Catherine M Flynn & Catherine M Verfaillie] Book Chapter, 2009

Catherine Flynn, Liver Abnormalites in HSCT, European Society of Bone Marrow Transplant, 2012, EBMT Invited Talk, 2012

C.M.Flynn, Transplantation for Bone Marrow Failure Disorders, Educational Conference, Virtual Meeting, 26/11/20, 2020, Hartley Taylor Invited Talk, 2020

Research Expertise


  • Title
    • To collect and characterize the biological and immunological properties of umbilical cord (UCB) stem cells
  • Summary
    • IBTS Research Programme Grant in Cell Therapy and Regenerative Medicine
  • Date From
    • 2011
  • Date To
    • 2017



National Specialty Director for Higher Specialist Training in Haematology 2011-2015

NCCP Cytogenetics Working Group 30/04/2021

NCCP Myeloid Clinical Advisory Group July 2019

Representation of the Irish Haematology Society Transfusion SIG Obstetrics Forum to the Anti D and Early Pregnancy Termination Clinical Advisory Forum 18/11/20

Representation as a Trainer towards acccreditation of the RCPI programme of specialist training in Haematology to the Irish Medical Council. 10/03/2020

Accreditation panel for TCD for the MSc in Laboratory Medicine 2010

National Advisory group on Paroxysmal Nocturnal Haemoglobinuria 2012

External Examiner for TU Dublin Laboratory Science Masters 2014

Awards and Honours

Anatomy with Distinction in Second Medical Examination 1991

Medicine and Surgery with Distinction in Final Medical Examination 1995


Haematology Association Of Ireland 2003 – Present

American Society of Haematology 2003 – Present

European Society of Blood and Marrow Transplantation 2007 – Present

Severe Aplastic Anaemia Working Party (SAAWP)/EBMT 2010 – Present

Royal College of Pathologists, London 2004 – Present

Fellow of Faculty of Pathology, RCPI 2011 – Present