[Virus-associated hemorrhagic colitis in the differential diagnosis of peracute rectal bleeding].

Severe anal bleeding together with increasing abdominal discomfort occurred in an 81-year-old woman previously hospitalized numerous times because of decompensated type II B diabetes. A suspected rectal cancer was excluded by biopsy from the lower to middle rectum, but the biopsy revealed histologically indurated and bleeding ulcerations. Typical nuclear inclusion bodies provided the diagnosis of virus-associated proctocolitis. Serological tests supported the diagnosis of infection with herpes simplex and cytomegalic virus. Laser coagulation stopped the bleeding. At the same time a Guillain-Barré syndrome was noted which improved after administration of cortisone and high parenteral doses of acyclovir.