Pereira, F.2012-06-252012-06-252011-09Nascer e Crescer 2011; 20(3): 143-1440872-0754http://hdl.handle.net/10400.16/1041ABSTRACT We present the clinical case of an infant with four months that was observed in the Gastroenterology Department for the presence of mucus and small amount of blood in stool. The child was in breastfeeded and had normal development and physical examination. Blood and fecal analysis were normal. Rectosigmoidoscopic examination and find an erosive rectocolitis with eosinophils. The diagnosis of allergic proctocolitis was considered. Cow milk products were excluded from the diet and three weeks later the patient was well.porRectosigmoidite alérgicaallergic proctocolitisjournal article