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MDCT and superparamagnetic iron oxide (SPIO)-enhanced MR findings of intrapancreatic accessory spleen in seven patients

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Authors
Kim, Se Hyung; Lee, Jeong Min; Han, Joon Koo; Kang, Won Joon; Jang, Jin Young; Shin, Kyung-Sook; Cho, Kyunghee C.; Choi, Byung Ihn
Issue Date
2006-03-18
Publisher
Springer Verlag
Citation
Eur Radiol 16:1887-1897
Keywords
PancreasCT . PancreasMR . Spleenabnormalities .Contrast mediaMR
Abstract
The aim of this study is to
retrospectively evaluate
intrapancreatic accessory spleen
(IPAS) with mutidetector computed
tomography (MDCT) and superparamagnetic
iron oxide (SPIO)-enhanced
magnetic resonance imaging (MRI)
with emphasis on the role of SPIOMRI
for the diagnosis of IPAS. Seven
patients (four men and three women;
mean age, 50.7 years) with IPAS
underwent quadriphasic MDCT and
SPIO-enhanced MRI. IPAS was diagnosed
histopathologically (n=2) or by
scintigraphy (n=5). Two radiologists
evaluated CT and MRI in consensus
for the location and size of each lesion
and compared its attenuation on CT
and signal intensity (SI) on MRI with
those of the pancreas and spleen. For
quantitative analysis, another radiologist
calculated the mean lesional,
pancreatic, and splenic attenuations or
SIs on MDCT or MRI in each patient.
All lesions were located in the pancreatic
tail. The average lesion size
was 1.5±0.5 cm. All IPASs except one
appeared high-attenuating to the pancreas
and were isoattenuating to the
spleen on all dynamic CT phases. The
IPASs were hypointense and hyperintense
compared with the pancreas on
unenhanced T1- and T2-weighted
images, respectively, and their SI was
similar to that of the spleen. On SPIOenhanced,
T2-weighted images, a
similar degree of signal drop to that of
the spleen was noted in all lesions.
The results of the quantitative analysis
were compatible with those of the
subjective analysis. In most IPASs, the
attenuation on CTand SI on MRI were
identical to those of the spleen, and on
SPIO-enhanced MRI, the degree of
the signal drop in all lesions was
similar to that of the spleen.
ISSN
0938-7994 (print)
1432-1084 (online)
Language
English
URI
http://hdl.handle.net/10371/9816
DOI
https://doi.org/10.1007/s00330-006-0193-6
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College of Medicine/School of Medicine (의과대학/대학원)Radiology (영상의학전공)Journal Papers (저널논문_영상의학전공)
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