Angioimmunoblastic T Cell Lymphoma Mimicking Chronic Urticaria

Figure 4

Composite: (a) H&E section of lymph node biopsy with an atypical infiltrate that is polymorphic with scattered large cells and prominent vascularity (40x). (b) Atypical lymph node cells showing immunoreactivity to CD3 (20x). (c) Atypical lymph node cells showing weak immunoreactivity to CD4 (20x). (d) Atypical lymph node cells showing partial immunoreactivity to CD10 (20x). (e) Atypical lymph node cells showing immunoreactivity to BCL-6 (20x). (f) Atypical lymph node cells showing immunoreactivity to CD5 (20x). (g) CD21 stain highlighting the follicular dendritic cells in a pattern consistent with angioimmunoblastic T cell lymphoma (20x). (h) Atypical lymph nodes cells showing immunoreactivity to perforin (20x).

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