Abstract
Purpose
Intraductal papillary neoplasms of the bile duct (IPNBs) are a group of rare lesions with uncertain clinical findings and imaging features. We aim to investigate the clinicopathological features and imaging findings of IPNBs on contrast-enhanced ultrasound (CEUS) and contrast-enhanced computed tomography (CECT).
Methods
From February 2005 to March 2018, 30 patients with pathologically confirmed IPNBs were retrospectively identified in our hospital. Demographic, clinical, and pathological data, CEUS and CECT features and surgical strategies were analyzed.
Results
The most common clinical manifestations were abdominal pain (53.3%), jaundice (23.3%), and acute cholangitis (10.0%). Among all lesions, 5/30 (16.7%) lesions presented as dilated bile ducts only, while 13/30 (43.3%) lesions presented as dilated bile ducts with intraductal papillary masses, and 12/30 (40.0%) presented as solid masses with dilated bile ducts. For the 20 patients who underwent both CEUS and CECT, 18 lesions were hyperenhanced on CEUS, and 17 lesions were hyperenhanced on CECT in the arterial phase. In total, 16 and 18 lesions showed washout in the portal and late phases on CEUS, while the corresponding number of lesions that showed washout in the portal and late phases on CECT were 11 and 13. Twelve lesions (40.0%) showed atypical hyperplasia, while 16/30 (53.3%) lesions underwent malignant transformations.
Conclusions
There are 3 major forms of IPNBs on grayscale ultrasound, including diffusely dilated bile ducts without visible mass; focal dilated bile duct with intraductal papillary masses; and solid mass surrounded by dilated bile ducts. The enhancement patterns of IPNBs on CEUS and on CECT were consistent. IPNB has a high malignant potential, and patients should be treated with surgical resection after the diagnosis is established.
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Abbreviations
- IPNB:
-
Intraductal papillary neoplasms of the bile duct
- CEUS:
-
Contrast-enhanced ultrasound
- CECT:
-
Contrast-enhanced computed tomography
- ICC:
-
Intrahepatic cholangiocarcinoma
- CPS:
-
Contrast pulse sequencing
- CHI:
-
Contrast harmonic imaging
- CA125:
-
Carbohydrate antigen 125
- CA19-9:
-
Carbohydrate antigen 19-9
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Acknowledgements
Financial Support: This study was funded by the National Nature Science Foundation of China (NO.81701701), Guangdong Nature Science Foundation (NO.2017A030313661,NO. 2016A030310143), Guangdong science and technology plan project (NO. 2017A020215195), Sun Yat-sen University young teachers training project(NO. 16YKPY37).
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Wei Wang and Bing Liao designed the research. Quan-Yuan Shan collected data; Ming Xu and Li-Da Chen evaluated the images and videos of US and CT. Hang-Tong Hu analyzed the data; Yang Huang edited tables and Figures; Qiao Zheng and Si-Min Ruan wrote the paper; Xiao-Yan Xie and Ming-De Lu edited the paper and polished the language.
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Zheng, Q., Ruan, SM., Shan, QY. et al. Clinicopathological findings and imaging features of intraductal papillary neoplasm of the bile duct: comparison between contrast-enhanced ultrasound and contrast-enhanced computed tomography. Abdom Radiol 44, 2409–2417 (2019). https://doi.org/10.1007/s00261-019-01987-4
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DOI: https://doi.org/10.1007/s00261-019-01987-4