Abstract
The food-induced eosinophilic proctocolitis is one of major causes of blood-tinged stools in early infancy in Western countries, whereas that is still rare in Japan here. We present a case of eosinophilic proctocolitis showing characteristic findings in Japanese 3-month-old male infant. He was a 3 month-old infant who had presented with rectal bleeding since 1-month-old. He was a breast-fed infant. Laboratory test showed hypereosinophilia (eosinophils:20%) and mild anemia (hemoglobin concentration:11.3g/dl). Bacterial, viral, and parasitic infection was excluded. Colonoscopy revealed inflammation with reddishness and severe edema in the rectum and the lower sigmoid colon. Biopsy specimen from the rectum showed diffuse infiltration of eosinophils in the lamina propria. Therefore, he was diagnosed as an eosinophilic proctocolitis. After the elimination of his mother's milk, he was released from rectal bleeding soon. Re-exam of the colonoscopy also showed an obvious improvement of the inflammation. This appeared to be a rare case of eosinophilic proctocolitis in Japanese 3-month-old infant caused by mother's milk.
Published Version
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