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Published online before print March 29, 2002, 10.1148/radiol.2232010815
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(Radiology 2002;223:547-553.)
© RSNA, 2002

Gastrointestinal Imaging

Pancreatic Cysts: Depiction on Single-Shot Fast Spin-Echo MR Images1

Xiao-Ming Zhang, MD, Donald G. Mitchell, MD, Masako Dohke, MD, George A. Holland, MD and Laurence Parker, PhD

1 From the Department of Radiology, Thomas Jefferson University Hospital, 1096 Main Bldg, 132 S 10th St, Philadelphia, PA 19107 (X.M.Z., D.G.M., M.D., G.A.H., L.P.); and Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Sichuan, People’s Republic of China (X.M.Z.). Received April 19, 2001; revision requested May 23; revision received August 10; accepted September 28. Address correspondence to D.G.M. (e-mail: donald.mitchell@mail.tju.edu).

PURPOSE: To evaluate single-shot fast spin-echo (SE) magnetic resonance (MR) imaging for depiction of pancreatic cysts in a large number of patients and to analyze cyst prevalence with respect to patient age and sex and other clinical information.

MATERIALS AND METHODS: Single-shot fast SE images of the pancreas were obtained in 1,444 patients. The images were reviewed for presence of pancreatic cysts, which were classified as simple and nonsimple types, and cyst diameters were measured. {kappa} statistic, Fisher exact, McNemar Q, and Pearson product moment correlation tests were performed.

RESULTS: Two hundred eighty-three (19.6%) patients had at least one pancreatic cyst. The prevalence of pancreatic cysts increased with age (r = 0.96). The percentages of male and female patients with pancreatic cysts (20.4% vs 18.8%) were not significantly different. Two hundred seventy-one (18.8%) patients had simple cysts, and 147 (10.2%) had nonsimple cysts. Of 283 patients with pancreatic cysts, 158 (55.8%) had only one pancreatic cyst. The number of patients with multiple cysts increased with age after 70 years. Four hundred fifteen (83.8%) cysts were 10 mm in diameter or smaller; 56 (11.3%), 11–20 mm in diameter; and 24 (4.9%), 21 mm in diameter or larger. Sixteen (5.7%) patients with pancreatic cysts had malignant pancreatic tumors, and 75 (26.5%) patients had pancreatitis.

CONCLUSION: The prevalence of pancreatic cysts at single-shot fast SE MR imaging—especially cysts with a diameter smaller than 10 mm—is similar to that of pancreatic cysts at autopsy and higher than that of pancreatic cysts at transabdominal ultrasonography. Prevalence is especially high in patients with pancreatitis.

© RSNA, 2002

Index terms: Pancreas, cysts, 770.312 • Pancreas, MR, 770.121411, 770.121416, 770.12143 • Pancreas, neoplasms, 770.312, 770.321 • Pancreatitis, 770.291




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