PMC4009207_01
(a) Protruding mass adjacent to the anal canal. (b) Atypical lymphocytes infiltrating the hematoxylin-eosin-stained lamina propria and the surface epithelium in certain locations (original magnification x40). (c) Cd79a-strained atypical lymphocytes infiltrating the lamina propria and the surface epithelium in certain locations (original magnification x40). (d) Cyclin D1-positive atypical lymphocytes infiltrating the lamina propria (original magnification x40). (e) Abdominal tomography. The 6 x 8 cm mass on the left-side wall of the rectum and the soft tissue mass inside the rectum. (f) Film showing the healed anal canal after treatment.
CRIHEM2014-621017.001.jpg
PMC4009207_01_CRIHEM2014-621017.001.jpg
fig1
During colonoscopy, a protruding mass was observed in the distal of the rectum (Figure 1(a)). During immunohistochemical staining, CD3+, CD5+, CD20+, CD19+, CD43+, CD45+, Cd79a+, and BCL2+ and cyclin D1+, CD23-, CD10- staining were observed (Figures 1(b), 1(c), and 1(d)). Abdominal tomography revealed a 6 x 8 cm mass on the left-side wall of the rectum and a soft tissue mass inside the rectum (Figure 1(e)). In the control colonoscopy, the mass on the distal of the rectum had disappeared (Figure 1(f)).