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Differentiation of Nonneoplastic and Neoplastic Gallbladder Polyps 1 cm or Bigger With Multi-Detector Row Computed Tomography

Park, Ko Woon MD*; Kim, Seong Hyun MD*; Choi, Seong Ho MD†; Lee, Won Jae MD*

Journal of Computer Assisted Tomography:
doi: 10.1097/RCT.0b013e3181b382d7
Abdominal Imaging
Abstract

Objective: To evaluate useful computed tomographic features to differentiate nonneoplastic and neoplastic gallbladder polyps 1 cm or bigger.

Methods: Thirty-one patients with 32 nonneoplastic polyps and 67 patients with 73 neoplastic polyps 1 cm or bigger underwent unenhanced and dual-phase (arterial and portal venous phases) multi-detector row computed tomography. Gallbladder polyps were diagnosed by cholecystectomy. Computed tomographic features including size (≤1.5 or >1.5 cm), surface (smooth or irregular), shape (pedunculated or sessile), accompanying wall thickening, basal indentation, perception on unenhanced images, and enhancement pattern between 2 groups were compared using univariate and multivariate analyses.

Results: On univariate analysis, age 55 years or older (P = 0.0019), size bigger than 1.5 cm (P < 0.0001), irregular surface (P = 0.0033), sessile shape (P = 0.0016), accompanying wall thickening (P = 0.0056), basal indentation (P = 0.0236), and perception on unenhanced images (P < 0.0001) were significantly more frequent in neoplastic polyps as compared with nonneoplastic polyps. On multivariate analysis, size bigger than 1.5 cm (P = 0.0260), sessile shape (P = 0.0397), and perception on unenhanced images (P < 0.0001) were statistically significant.

Conclusions: Size bigger than 1.5 cm, sessile shape, and perception on unenhanced images are the main factors that differentiate neoplastic from nonneoplastic gallbladder polyps 1 cm or bigger.

Author Information

From the Departments of *Radiology and Center for Imaging Science, and †Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea.

Received for publication April 26, 2009; accepted June 16, 2009.

Reprints: Seong Hyun Kim, MD, Department of Radiology Samsung Medical Center, Sungkyunkwan University School of Medicine 50, Ilwon-dong, Gangnam-gu, Seoul 135-710, South Korea (e-mail: kshyun@skku.edu).

We have no financial disclosure.

© 2010 Lippincott Williams & Wilkins, Inc.