PAX5 and primary cutaneous T-cell non-Hodgkin lymphoma: The diagnosis of non-epitheliotropic cutaneous T-cell lymphoma was based on CD3 positivity, but approximately 50% of the infiltrating cells did not stain with CD3 or PAX5 antibodies and could have represented a neoplastic population of B-cells with clonal IgH rearrangement and down-regulation of PAX5.