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Malignant carotid artery invasion: sonographic detection
G A Gooding1, A W Langman, W P Dillon
1Department of Radiology, University of California, San Francisco.
Radiology
|May 1, 1989
Summary
High-resolution ultrasound reliably detects the absence of carotid artery invasion by tumors. However, sonography has limitations in confirming actual invasion, with a low positive predictive rate.
Area of Science:
- Oncology
- Radiology
- Vascular Surgery
Background:
- Carotid artery invasion by metastatic neck disease poses significant management challenges.
- Accurate preoperative assessment of carotid artery involvement is crucial for surgical planning and patient outcomes.
Purpose of the Study:
- To evaluate the diagnostic accuracy of high-resolution ultrasonography in detecting the absence of tumor invasion of the carotid artery.
- To determine the sensitivity and specificity of sonography for identifying carotid artery invasion.
Main Methods:
- Prospective evaluation of 24 patients with metastatic neck disease.
- Comparison of high-resolution ultrasound findings with surgical and pathological results.
- Use of 5- and 10-MHz transducers for sonographic examinations.
Main Results:
- Sonography demonstrated 100% sensitivity in detecting the absence of carotid artery invasion.
- The positive predictive value for diagnosing carotid invasion was 44.4% (5 false-positive studies).
- Specific criteria for invasion included breaks in the carotid wall and intraluminal tumor visualization.
Conclusions:
- High-resolution ultrasonography is highly reliable for ruling out carotid artery invasion by metastatic tumors.
- Sonography has limitations in confirming carotid artery invasion, necessitating careful interpretation of findings.
- Further refinement of sonographic criteria may improve the accuracy of detecting actual carotid invasion.