Cytomegalovirus colitis in a patient with Behcet’s disease receiving tumor necrosis factor alpha inhibitory treatment

Figure 1 Colonoscopic appearance of the mucosa before (A) and during the 14 d of anti-viral treatment (B). The presence of edema and redness is seen in both images. Note the ulcers in the sigmoid colon before the treatment as shown in A.

Figure 2 Colonic endothelial cells showing positive nuclear (A) and cytoplasmic (B) immunostaining of the CMV antigen.