Department of Haematological Medicine, King’s College Hospital NHS Foundation Trust, Denmark Hill, London, SE5 9RS, UK

Henry Wood

Department of Histopathology, King’s College Hospital NHS Foundation Trust, London, UK

Olivia McKinney

H.W. identified the case, photographed the blood film and wrote the paper. O.M. suggested the use of peripheral blood clot sections, reported and photographed these and other tissue sections and reviewed the paper.

Correspondence to Henry Wood.