Key words acute duodenal ulcer, infant, rotavirus.Rotavirus is an important pathogen causing human viral gastroenteritis during infancy. Typically, rotavirus gastroenteritis begins with a mild-to-moderate fever and vomiting, followed by the onset of frequent watery stools. While the clinical complaints are generally intestinal, there is evidence of disease outside the gastrointestinal tract, including elevated liver transaminases, 1 benign infantile convulsions, 2 severe central nervous system disease, 3 and necrotizing enterocolitis (NEC). 4 In this paper, we report an infant with severe hematemesis and melena, caused by an acute duodenal ulcer associated with rotavirus infection.
Case reportA 9-month-old female infant, who was born at 40 weeks' gestation weighing 3,094 g, was referred to us because of severe hematemesis and melena. Initially, she developed vomiting, watery diarrhea, and a temperature of 38.6°C. She was treated with a 7-mg domperidone suppository twice, but no antipyretic. On the third day of her illness, severe hematemesis and melena developed abruptly and she was brought to our hospital by ambulance.On admission, the patient was apathetic and cyanotic, without pyrexia, and failed to respond well to external stimuli. Her skin was pale and dry. Her pulse was 170/min and weak and the blood pressure was 70/0 mmHg. The abdomen was flat and soft. Routine hematological examinations showed a white blood cell count of 15,600/mL, a platelet count of 35.2 ¥ 10 4 /mL, a C-reactive protein less than 0.2 mg/dL, and severe anemia, with hemoglobin of 7.1 g/dL and a hematocrit of 21.1%. The activated partial thromboplastin time, prothrombin time, and hepaplastin test results were 40.5 s, 54.3% (prothrombin time-international normalized ratio 1.42), and 42.0%, respectively. Increased blood urea nitrogen of 22.8 mg/dL and uric acid of 14.7 mg/dL were found, associated with dehydration and a large amount of intestinal bleeding. Blood gas analysis showed metabolic acidosis: pH 7.176, HCO 3 -11.1 mmol/L, and base excess 17.0 mmol/L. The stool was negative for pathogenic bacteria, including Clostridium difficile toxins A and B, and Helicobacter pylori (H.pylori) antigen, but positive for rotavirus. Other viral studies were negative, including cytomegalovirus and Epstein-Barr virus. Ultrasonography of the abdomen revealed a thick gastric wall. Computed tomography to detect a bleeding site showed the thick gastric wall and suggested bleeding at the duodenal cap (Fig. 1). Endoscopy revealed a broad ulcer of the duodenal cap with blood coagula filling the duodenal lumen (Fig. 2a). Biopsy was not carried out because of the risk of re-bleeding.Treatment with a fluid bolus was started immediately, followed by a red blood cell transfusion, and fresh frozen plasma was also given. Intravenous administration of a proton-pump inhibitor and antacid was begun and the patient made favorable progress. Antibodies against H. pylori on admission and 2 months later were negative. Endoscopic examination 2 months later showed disappearan...