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FIG. 1

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Intestinal specimen from a patient with acute amebic colitis. Several nodular lesions show characteristic rounded, slightly elevated areas of the mucosa with irregular necrotic centers surrounded by edematous hyperemic tissue. The necrotic centers are filled with a yellowish mucoid material, except in two ulcers, where the center is hemorrhagic. The intervening mucosal folds have a mostly normal appearance, although one segment is congested and edematous.

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