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. 2022 Dec 1;482(1):131–145. doi: 10.1007/s00428-022-03460-y

Fig. 6.

Fig. 6

B-PLL. An 84-year-old man presented with marked leukocytosis and anemia. Splenomegaly and mesenteric and retroperitoneal lymphadenopathy was found. The white cell differential showed 82% prolymphocytes. Flow cytometry showed a kappa-restricted B-cell population expressing CD19 and bright CD20 lacking CD5, CD10, CD23, and FMC7. FISH for cyclin D1 rearrangement was negative and karyotyping showed no structural evidence of CCND1, CCND2, or CCND3 rearrangement. The blood smear showed numerous prolymphocytes compatible with B-PLL (100 ×). In current practice, a case with this type of morphology would require FISH studies to exclude CCND1, CCND2, and CCND3 rearrangements