Additional phenotypic features of BLL.

Upper left shows strong expression of CD10 in BLL sample (frozen section, × 400); upper right, near-absent expression of Bcl-2 in BLL cells (paraffin section, × 400); lower left, near-absent expression of LFA in BLL cells (frozen section, × 400); and lower right, low T-TIL numbers as assessed by reactivity of only rare cells with CD8 (frozen section, × 400).