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Sonographic Characteristics of ≥7 mm Gallbladder Polyps: A Retrospective Analysis
Jessie L Chai1, Esther Baranov2, Andro Reginald Licaros3
1Division of Abdominal Imaging and Intervention, Department of Radiology, Brigham and Women's Hospital, Boston, Massachusetts, USA.
Summary
Most gallbladder polyps are benign and non-neoplastic. Increased echogenicity on ultrasound is common in both benign and neoplastic gallbladder polyps, making it a nonspecific finding.
Area of Science:
- Radiology
- Gastroenterology
- Pathology
Background:
- Gallbladder polyps are common findings during abdominal ultrasound.
- Accurate characterization of gallbladder polyps is crucial for clinical management.
- Understanding sonographic features can aid in differentiating benign from neoplastic lesions.
Purpose of the Study:
- To detail the ultrasound characteristics of gallbladder polyps measuring 7mm or larger.
- To correlate sonographic findings with surgical pathology.
- To evaluate the size stability of gallbladder polyps over time.
Main Methods:
- Retrospective analysis of ultrasound reports (2012-2020) using natural language processing.
- Identification and categorization of polyps ≥7mm based on echogenicity relative to the gallbladder wall.
- Review of surgical pathology and long-term ultrasound follow-up for benign characterization.
Main Results:
- 550 reports identified 450 patients with gallbladder polyps ≥7mm.
- Surgical pathology (99 patients) revealed 97% non-neoplastic and 3% neoplastic polyps; no malignancies.
- Increased echogenicity was observed in all neoplastic and 56.1% of non-neoplastic polyps.
Conclusions:
- The majority of gallbladder polyps are benign.
- Increased echogenicity is a nonspecific sonographic feature in gallbladder polyps.
- Findings support current Society of Radiologists in Ultrasound guidelines for gallbladder polyp management.
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