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Related Concept Videos

Assessment of the Rectum and Anus01:25

Assessment of the Rectum and Anus

Evaluating the rectum and anus plays a crucial role in conducting a thorough physical examination of the gastrointestinal system. Although it may be uncomfortable and often embarrassing for the patient, it holds immense diagnostic value, particularly in detecting gastrointestinal diseases and abnormalities. This guide will explain how to perform this assessment using inspection and palpation methods.
Rectal Inspection
Begin by inspecting the perianal and anal areas for color, texture, rashes,...

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Laparoscopic Radical Gastrectomy for Remnant Gastric Cancer
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IGRT in rectal cancer.

Edy Ippolito1, Ine Mertens, Karin Haustermans

  • 1Department of Radiotherapy, Policlinico A.Gemelli, Universita Cattolica del S, Cuore, Rome, Italy.

Acta Oncologica (Stockholm, Sweden)
|July 29, 2008
PubMed
Summary
This summary is machine-generated.

Image-guided radiation therapy (IGRT) shows promise for improving rectal cancer treatment, especially for high-risk patients. Advanced techniques like 3D planning and Intensity Modulated Radiation Therapy (IMRT) enhance target coverage and organ sparing.

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Area of Science:

  • Radiation Oncology
  • Medical Physics
  • Clinical Oncology

Background:

  • Clinical implementation of Image-guided radiation therapy (IGRT) for rectal cancer is limited, despite potential benefits.
  • Current treatments achieve low locoregional recurrence rates (approx. 10%), but improvements are needed for high-risk patients (cT3 CRM+, cT4, N+).

Purpose of the Study:

  • To evaluate the role of advanced radiation therapy techniques in improving rectal cancer treatment outcomes.
  • To emphasize the need for precise definition of clinical target volume (CTV) and planning target volume (PTV) before implementing 3D or IMRT.
  • To investigate the impact of mesorectal movement on treatment accuracy.

Main Methods:

  • Comparison of 2D and 3D radiation planning for rectal cancer.
  • Analysis of preliminary results from studies conducted in Rome and Leuven Universities.
  • Systematic review of literature on IGRT for rectal cancer.

Main Results:

  • Preliminary data suggests 3D planning is superior to 2D for target volume coverage, particularly in T4 patients.
  • Significant mesorectal displacements were observed, highlighting the need to account for organ motion.
  • IGRT can potentially improve accuracy by tracking target volumes and organs at risk during treatment.

Conclusions:

  • Advanced radiation techniques (3D, IMRT) offer potential improvements for high-risk rectal cancer patients.
  • Accurate delineation of CTV and PTV, along with appropriate PTV margins, is crucial.
  • IGRT may enhance dose delivery accuracy by adapting to organ motion, supporting dose escalation studies.