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Gastrointestinal submucosal tumors: evaluation with endoscopic US
K Kawamoto1, Y Yamada, T Utsunomiya
1Department of Radiology, Faculty of Medicine, Kyushu University, Fukuoka, Japan.
Radiology
|December 11, 1997
Summary
Endoscopic ultrasound (US) helps differentiate benign from malignant gastrointestinal submucosal tumors. Hypoechoic homogeneous lesions are often malignant, while other echogenicity patterns are typically benign.
Area of Science:
- Gastroenterology
- Medical Imaging
- Oncology
Background:
- Submucosal tumors (SMTs) are growths in the gastrointestinal tract wall.
- Accurate differentiation between benign and malignant SMTs is crucial for patient management.
- Endoscopic ultrasound (EUS) offers detailed imaging of these lesions.
Purpose of the Study:
- To characterize the endoscopic ultrasound (EUS) features differentiating benign from malignant submucosal tumors.
- To establish imaging criteria for improved diagnosis of gastrointestinal SMTs.
Main Methods:
- A cohort of 109 patients with suspected submucosal tumors underwent endoscopic ultrasound (EUS).
- Tumors from the esophagus, stomach, duodenum, and colon were analyzed.
- Radiologists evaluated lesion origin, echo pattern, and margins using consensus and independent interpretation.
Main Results:
- Hypoechoic homogeneous lesions were frequently malignant (94%), but also observed in benign cases (43%).
- Anechoic, intermediate, or hyperechoic homogeneous lesions were predominantly benign (98%).
- Malignant lesions were often heterogeneous (96%) or homogeneously hypoechoic, with significant size differences compared to benign lesions.
Conclusions:
- Endoscopic ultrasound (EUS) is a valuable tool for the differential diagnosis of gastrointestinal submucosal tumors.
- Specific EUS echo patterns can aid in distinguishing between benign and malignant SMTs.