A case of primary appendiceal intussusception: usefulness of ultrasonography in the preoperative diagnosis

Abstract

We reported a case of primary appendiceal intussusception diagnosed with abdominal ultrasonography. An 83-year-old man with abdominal discomfort was referred to our hospital for endoscopic resection of cecal adenoma. Abdominal ultrasonography depicted multiple concentric ring sign and hay-fork sign at the right lower abdomen, indicating appendiceal intussusception. And there was a low echoic mass at the proximal side of the hay-fork sign. We diagnosed primary appendiceal intussusception with appendiceal tumor. Surgery was performed and the diagnosis was confirmed. Ultrasonography was very useful in the preoperative diagnosis.