Section committee elected by In 1991, the Royal College of Pathologists awarded him its first Distinguished Service Medal for establishing the United Kingdom's system of pathology laboratory accreditation.
He greatly contributed to the testing of leukemia treatment methods and conducted the unique researches on "thiopurine metabolism" which was made on children suffered with leukemia. Other branch of medicine that is of great interest to him is childhood ITP, where he feels qualms about the early treatment of this disease with the help of immunoglobulin.
He served as President of the Royal Society of Medicine from 2004 to 2006. Being the President of the Royal College of Pathologists he has also the role of Vice-Chairman of the Academy of the Medical Royal Colleges. In 2004 with the difference of three months he became medical director of the National Patient Safety Agency (NPSA) and the president of the Royal Society of Medicine  At the moment he works as strategic Advisor to the National Research Ethics Service.
- ‘LILLEYMAN, Sir John (Stuart)’, Who's Who 2012, A & C Black, 2012; online edn, Oxford University Press, Dec 2011 ; online edn, Nov 2011 accessed 22 Feb 2012
- John S. Lilleyman (1992)Paediatric Haematology. Publisher: Churchill Livingstone (1 November 1992). ISBN 0443043663
- John S. Lilleyman (1994). Childhood Leukaemia: The Facts (The Facts Series). Publisher: Oxford University Press (25 August 1994). ISBN 0192624512
- John S. Lilleyman (1999). Pediatric Hematology, 2e. Publisher: Churchill Livingstone; 2 edition (11 May 1999) ISBN 0443058407
Sir Roderick MacSween
|President of the Royal College of Pathologists
1999 – 2002
Sir James Underwood