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Intussusception (Radiology)

Jin (토론 | 기여)님의 2019년 3월 2일 (토) 13:31 판
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Intussusception의 Key imaging features는 multiple layered target like lesion.

Imaging features

USG[1]

  • Oval hypoechoic mass
    • Pseudokidney or doughnut sign
    • Hypoechoic rim with central echogenicity
    • Multiple layers and concentric rings
  • Small amount of peritoneal fluid or Large amount of peritoneal fluid(suggests perforation, especially echogenic ascites)
  • Diameter[2]
    • Mean diameter: 2.63 cm(range, 1.3–4.0 cm) for ileocolic intussusception(1.42 cm(range, 0.8–3.0 cm) for small-bowel intussusception)
  • Etc
    • Spontaneous reduction of intussusception is a well-known phenomenon that has been documented sonographically
    • Transient small bowel intussusception is a common occurrence, especially in patients with hyperperistalsis
      • not associated with substantial edema in the intussuscepted loops->thinner peripheral rim

Differential diagnosis