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MR imaging of adult colo-rectal intussusception. A case report

L Blomqvist1, A von Rosen, T Hindmarsh

  • 1Department of Diagnostic Radiology, Karolinska Hospital, Stockholm, Sweden.

Acta Radiologica (Stockholm, Sweden : 1987)
|November 1, 1995
PubMed

Insights

A sigmoid colon cancer was mistakenly diagnosed as rectal cancer on MR imaging. This case highlights the importance of detailed MR findings in differentiating intussuscepted sigmoid tumors from rectal cancers.

Area of Science:

  • Radiology
  • Oncology
  • Gastroenterology

Background:

  • Accurate diagnosis of colorectal cancers is crucial for effective treatment planning.
  • Sigmoid colon cancer can sometimes present with intussusception, mimicking other pelvic pathologies.
  • Magnetic Resonance (MR) imaging offers detailed anatomical visualization of the pelvic region.

Observation:

  • A case of intussuscepted sigmoid cancer was initially misinterpreted as a rectal carcinoma on MR imaging.
  • High-resolution MR imaging techniques, including pelvic-phased array coils and fast spin-echo sequences, were employed.
  • The specific MR findings associated with the intussuscepted sigmoid cancer were analyzed.

Findings:

  • The intussuscepted sigmoid cancer exhibited distinct MR characteristics that differentiated it from a primary rectal carcinoma.
  • Detailed analysis of the tumor's location, morphology, and relationship to surrounding structures on MR imaging is key.
  • Misinterpretation can arise from the complex appearance of intussusception within the pelvis.

Implications:

  • This case underscores the need for careful interpretation of MR imaging in suspected colorectal malignancies.
  • Awareness of intussuscepted sigmoid cancer presentation can prevent diagnostic errors and guide appropriate management.
  • Advanced MR techniques can enhance diagnostic accuracy for challenging pelvic tumor cases.

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