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a BM biopsy is markedly hypercellular (∼100%). H&E. ×100. b Diffusely infiltrated by widely spaced lymphoid cells, with round, oval or irregular nucleus, many with a moderate amount of cytoplasm with a shaggy irregular outline. Fried egg appearance. c Cells are positive for CD20, DBA44. ×100. Annexin A1 and CD25. ×200.
