(A–F) Hairy-cell leukaemia, haematoxylin and eosin (H&E) staining (A) ×40; (B) ×200; (C) TRAP, ×200; (D) CD25, ×200; (E) DBA44, ×200; (F) CD20, ×200. (A–F) Hairy-cell leukaemia, haematoxylin and eosin (H&E) staining (A) ×40; (B) ×200; (C) TRAP, ×200; (D) CD25, ×200; (E) DBA44, ×200; (F) CD20, ×200. (G–K) Myelodysplastic syndrome (refractory anaemia with excess blasts), H&E staining (G) ×100; (H) ×200; (I) glycophorin C, ×200; (J) myeloperoxidase, ×200; (K) CD34, ×200. K N Naresh et al. J Clin Pathol 2006;59:903-911 Copyright © by the BMJ Publishing Group Ltd & Association of Clinical Pathologists. All rights reserved.