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  • Title: Sonographic diagnosis of intussusception of the appendix vermiformis.
    Author: Pumberger W, Hörmann M, Pomberger G, Hallwirth U.
    Journal: J Clin Ultrasound; 2000; 28(9):492-6. PubMed ID: 11056028.
    Abstract:
    We present 2 cases of intussusception of the appendix vermiformis (IAV) in children. Sonographic examination demonstrated a lead point within a characteristic multiconcentric ring sign, and longitudinal sonograms showed the inverted appendix protruding into the cecal lumen. A contrast-enema study, using a water-soluble contrast medium, was performed in each case, and a "coiled-spring" sign or "spiral shell" appearance confirmed the diagnosis. A surgical reduction of the appendix and an appendectomy were performed in each case.
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