[Malacoplakia of the ascending colon and appendix in children. Report of a case with ultrastructural observations].

Description of a case of malacoplakia involving the ascending colon and appendix in a 11-year-old boy with history of severe diarrhea. The lesions were studied by light and electron microscopy. They were composed of proliferation of histiocytes with the typical cytoplasmic inclusions known as Michaelis-Gutmann bodies. The authors comment the pathogenesis of malakoplakia pointing out its rarity in infancy and in the intestine. They also review the literature and stress the importance of the development of malakoplakia in severe enterocolitis.