Renal involvement in patients with autoimmune pancreatitis: Ultrasound findings

Abstract Objective The purpose of our study was to retrospectively evaluate the ultrasound findings of renal involvement in patients with autoimmune pancreatitis. Methods 15 patients with autoimmune pancreatitis (15 male, 0 female, mean age 66 years old, range 44–85) who had renal involvement docume...

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Bibliographic Details
Published in:European journal of radiology 2012-05, Vol.81 (5), p.807-810
Main Authors: Sasiwimonphan, Kewalee, Gorman, Brian, Kawashima, Akira, Chari, Suresh T, Takahashi, Naoki
Format: Article
Language:English
Subjects:
Adult
Aged
Autoimmune
Autoimmune Diseases - complications
Autoimmune Diseases - diagnostic imaging
Female
Humans
IgG4
Kidney
Male
Middle Aged
Nephritis
Nephritis - complications
Nephritis - diagnostic imaging
Pancreatitis
Pancreatitis - complications
Pancreatitis - diagnostic imaging
Radiology
Reproducibility of Results
Sensitivity and Specificity
Ultrasonography - methods
Ultrasound
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Summary:Abstract Objective The purpose of our study was to retrospectively evaluate the ultrasound findings of renal involvement in patients with autoimmune pancreatitis. Methods 15 patients with autoimmune pancreatitis (15 male, 0 female, mean age 66 years old, range 44–85) who had renal involvement documented on CT or MR and had abdominal ultrasound within 1 month were included. Ultrasound images were retrospectively reviewed for presence or absence of renal involvement. Shape and echogenicity of the renal lesions were recorded. Results In 8 out of 15 patients, at least one renal lesion was identified on ultrasound with a total of 9 kidneys. In 7 kidneys, lesions appeared as ill-defined, non-mass like areas of decreased echogenicity. Three lesions showed associated irregular lobular thickening of the renal parenchyma with bulging contour and 1 showed focal area of parenchymal loss. In 2 kidneys, the lesions were seen as solitary or multiple hypoechoic mass-like areas. Ill-defined, non-mass like lesions on ultrasound corresponded to well-circumscribed wedge-shaped lesions in all but one case on CT or MR. Mass-like lesions on ultrasound corresponded to well-circumscribed round lesions on CT or MR. Conclusion Most common ultrasound findings of renal involvement in patients with autoimmune pancreatitis were ill-defined area of decreased echogenicity.
ISSN:0720-048X
1872-7727
DOI:10.1016/j.ejrad.2011.02.002