title: Multiple concentric ring sign in the ultrasonographic diagnosis of intussusception.
abstract: Gray scale ultrasound examination of two patients with abdominal space-occupying lesions demonstrated characteristic ring shadows on longitudinal scans. In one case a multiple concentric ring shadow resulted from an ileocolic intussusception, and in the other a "bull's eye" image was due to an infiltrating carcinoma of the pyloric antrum. A study of these patients confirms the suspicion [1] that there is a characteristic ultrasonic appearance of intussusception in bowel loops.
mesh_terms: D000230:Adenocarcinoma / Q000175:diagnosis; D002288:Adenocarcinoma, Mucinous / Q000175:diagnosis; D000368:Aged; D002430:Cecal Neoplasms / Q000175:diagnosis; D002432:Cecum; D005260:Female; D006801:Humans; D007082:Ileum; D007443:Intussusception / Q000175:diagnosis*; D008875:Middle Aged; D011706:Pyloric Antrum; D013274:Stomach Neoplasms / Q000175:diagnosis; D014463:Ultrasonography