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Dilated base of appendix with a spherical contour and thinned walls. It is distended by fluid and reaches over 3 cm in diameter. The appendix shows a maximal caliber of 1.2 cm. No intraluminal air to suggest any superadded infection. No appendiceal mural thickening or periappendiceal fat stranding. No ileocolic lymphadenopathy or localized collections.