case_images: PMC2533105_01
case_images: Biopsy specimens revealed multiple diffuse CD20 positive (a) B-cell infiltrates
  involving mucosa and submucosa of colon without formation lymphoepithelial
  lesions. B-lymphocytes expressed also CD5 with low intensity (b) and CD23 (c),
  characteristic of small lymphocytic lymphoma (CLL).
case_images: GRP2008-742146.001.jpg
case_images: PMC2533105_01_GRP2008-742146.001.jpg
case_images: fig1
case_images: Microscopically dense mucosal and submucosal lymphocytic infiltrates were detected in ileum as well as 4/7 biopsies of colon  (Figures 1(a), 1(b), and 1(c)), with predominance of small CD20 positive lymphocytes.