Cytomegalovirus colitis in a child with leukemia: a case report.

A 17-month-old boy with a known case of T-cell acute lymphoblastic leukemia was admitted to the authors' hospital because of blood-streaked diarrhea a week after his last chemotherapy session. Initially, he was treated with supportive care and an empiric regimen for opportunistic causes of diarrhea; however, this was not effective. Eventually, evaluation of his stool with PCR showed positivity for cytomegalovirus. Consequently, he responded dramatically to treatment with ganciclovir. Although cytomegalovirus colitis is rare, a few case reports suggest cytomegalovirus as a possible cause of colitis in children with leukemia, which can be fatal and should be considered as a differential diagnosis.