Comparative study for preoperative staging of rectal cancer

Area of Science:

• Oncology
• Medical Imaging
• Surgical Assessment

Background:

• Accurate preoperative staging is crucial for effective rectal cancer treatment planning.
• Various imaging modalities are used to evaluate rectal cancer extent.
• Comparing the diagnostic accuracy of these methods is essential for clinical practice.

Purpose of the Study:

• To compare the accuracy of digital rectal examination (DRE), transrectal ultrasound (TRUS), and computerized tomography (CT) in preoperative staging of rectal cancer.
• To determine the most effective imaging modality for assessing rectal wall invasion.
• To evaluate the role of each modality in the overall preoperative assessment of rectal cancer.

Main Methods:

• A comparative study involving 68 patients diagnosed with rectal cancer.
• Preoperative evaluation using digital rectal examination, CT, and TRUS.
• Comparison of preoperative staging results with final pathologic findings after surgery.

Main Results:

• Digital rectal examination achieved 82.8% accuracy in staging rectal cancer.
• Transrectal ultrasound demonstrated 76.2% accuracy in staging.
• Computerized tomography showed 65.5% accuracy for rectal wall invasion assessment.
• Both DRE and TRUS were found to be superior to CT for evaluating rectal wall invasion.

Conclusions:

• Digital rectal examination and transrectal ultrasound are highly effective for preoperative rectal cancer assessment.
• While CT plays a role, DRE and TRUS offer superior accuracy for evaluating rectal wall invasion.
• These findings support the combined use of DRE and TRUS for optimizing preoperative staging in rectal cancer patients.