PMC3137984_01
Papular, purplish cutaneous lesions of urticaria pigmentosa on the forearms.
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fig1
Peripheral blood smear showing an atypical lymphocyte with elongated cytoplasm processes.
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fig2
Peripheral blood smear showed morphologically abnormal lymphocytes with elongated cytoplasmic extensions (Figure 2).
(a) Bone marrow biopsy with areas of infiltration by villous lymphocytes (2 arrows) and areas of infiltration by mast cells and fibrosis (arrow) (haematoxylin-eosin, original magnification x200). (b) Areas of mast cell infiltration in the bone marrow (Mast cell stain x150). (c) Villous lymphocytes in the bone marrow (CD20 stain x150).
DRP2011-385074.003.jpg
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fig3