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STUDY ON CHARACTERISTICS OF ENDOSCOPIC ULTRASOUND IMAGES IN PATIENTS WITH ESOPHAGEAL CANCER
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Abstract
Background: Endoscopic ultrasound is one of the early and accurate methods of diagnosing esophageal cancer in terms of stage and prognosis, making an important contribution to treatment orientation. Objectives: To describe the characteristics of endoscopic ultrasound images in patients with esophageal cancer and explore the relationship between some features of endoscopic ultrasound images with clinical characteristics, endoscopic images, computed tomography, and histopathology. Subjects and methods: An analytical, retrospective, prospective, and cross-sectional descriptive study was conducted on 40 patients diagnosed with esophageal cancer based on histopathology and endoscopic ultrasonography. Results: Among 40 study subjects, esophageal cancer was common in the middle third, accounting for 50%, the lower third for 37.5%, and the upper third for 12.5%. Lesions on endoscopic ultrasound are mainly hypoechoic with 85%, 15% are hyperechoic and mixed. The value of similarity between endoscopic ultrasound and computed tomography scan in diagnosing tumor staging is weak (Kappa = 0.296), diagnosing metastatic lymph nodes (Kappa = 0.396), diagnosing esophageal cancer according to TNM/AJCC7 classification (Kappa = 0.355). Conclusion: Endoscopic ultrasound plays a vital role in staging the disease; however, it is necessary to combine many imaging methods in diagnosing esophageal cancer before treatment.
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Keywords
endoscopic ultrasound, esophageal cancer, computed tomography
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