Figura 1. Figura 2. Stanley SL Jr. Lancet ; Huston CD.
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Patient underwent surgery after an initial diagnosis of a perforated cecal neoplasm of an appendiceal adhesion mass.
Histology confirmed the presence of trophozoites of E. Histolytica in an area of ulceration and necrosis of the cecum wall. While initially the ameboma was treated medically, clinical manifestations led to surgery with good evolution. However, users may print, download, or email articles for individual use.
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Ameboma cecal. Complicación de la amebiasis intestinal.
Amebiasis is the infection of the human gastrointestinal tract by Entamoeba histolytica EH , a protozoan parasite that is capable of invading the intestinal mucosa and spreading to other organs causing abscesses. Nevertheless, amebiasis also occurs sporadically in the temperate climates of developed countries and in some risk groups. Increased severity of amebiasis is noted in children especially newborns , in women who are pregnant or postpartum, corticosteroid users, individuals with malignancy, and in the malnourished patients. Presentation ranges from mild diarrhea to dysentery and liver abscesses. However, it is known that even after years of the last episode of dysentery, a localized infection in the colon may, rarely, form a segmental mass, called ameboma. This occurs more frequently in patients untreated or inadequately treated during the course of an amoebic colitis. Diagnosis is difficult and in most cases done after surgical interventions due to insidious onset and variability of signs and symptoms.
Several protozoan species in the genus Entamoeba colonize humans, but not all of them are associated with disease. Entamoeba histolytica is well recognized as a pathogenic ameba, associated with intestinal and extraintestinal infections. Other morphologically-identical Entamoeba spp. While the discussed species are morphologically-identical, E. Non-pathogenic amebae e.