Pulmonary staging in colorectal cancer--is computerised tomography the answer?

Area of Science:

• Oncology
• Radiology
• Diagnostic Imaging

Background:

• Pulmonary staging for colorectal cancer (CRC) traditionally uses chest X-ray (CXR).
• Thoracic computed tomography (CT) is increasingly used for staging CRC.
• Assessing the utility of pre-operative thoracic CT for pulmonary staging in CRC is crucial.

Purpose of the Study:

• To evaluate the effectiveness of pre-operative thoracic CT in pulmonary staging for colorectal cancer (CRC).
• To compare the diagnostic accuracy of thoracic CT with traditional chest X-ray (CXR) for CRC staging.

Main Methods:

• Prospective data collection over 20 months for patients with symptoms suggestive of CRC.
• Staging contrast-enhanced CT of the chest, abdomen, and pelvis for diagnosed CRC patients.
• Independent radiologist review of chest X-rays (CXRs) for patients with thoracic CT abnormalities.

Main Results:

• 38 out of 403 barium enemas (9%) demonstrated CRC.
• Nine CRC patients (24%) showed abnormalities on thoracic CT.
• Thoracic CT identified abnormalities missed by CXR, influencing treatment decisions.

Conclusions:

• Thoracic CT enhances the accuracy of pulmonary staging in colorectal cancer (CRC).
• Improved staging with CT facilitates more appropriate treatment interventions.
• Caution is advised to avoid over-investigation of benign findings, ensuring focus remains on the primary tumor.