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. Author manuscript; available in PMC: 2013 Feb 1.
Published in final edited form as: Am J Dermatopathol. 2012 Feb;34(1):126–128. doi: 10.1097/DAD.0b013e31821c35cb

FIGURE 1.

FIGURE 1

PD-1 and PD-L1 expression at various stages of CTCL/MF: patch/plague (upper row), tumor (middle row), and large cell transformation (lower row). The formalin-fixed, paraffin-embedded skin biopsy tissue sections were stained with H&E (left column) or antibodies against PD-1 (middle column) or PD-L1 (right column). The depicted images are representative of the 26 CTCL cases examined and were captured at the 400X magnification. The blue arrows in the PD-1 stain of the large cell transformation case highlight the negative large lymphocytes.