TY - JOUR
T1 - Inflammatory pseudotumor of the kidney with renal artery penetration
AU - Nakamura, Yuko
AU - Urashima, Masaki
AU - Nishihara, Reisuke
AU - Matsuura, Akiko
AU - Bekku, Kensuke
AU - Iguchi, Hiroki
AU - Uesugi, Tatsuya
AU - Saegusa, Michihisa
AU - Aramaki, Kenji
PY - 2007/12
Y1 - 2007/12
N2 - Inflammatory pseudotumor (IPT) is a quasineoplastic lesion that most commonly involves the lung and the orbit; kidney involvement is rare. We report a case of inflammatory pseudotumor of the kidney. The patient was a 61-year-old man who presented with no symptoms. Nonenhanced computed tomography (CT) demonstrated an ill-defined, isodensity mass measuring 3.5∈cm in the lower portion of the left kidney. Contrast-enhanced CT showed that branches of the renal artery without encasement penetrated the tumor; there was a little enhancement in the mass on the arterial phase and homogeneous enhancement on the venous phase. On magnetic resonance imaging the mass showed intermediate signal intensity on T1-weighted images (T1WIs) and low signal intensity on T2WIs. Most IPTs of the kidney appear as an ill-defined, hypovascular, homogeneous tumor on CT images, with variable signal intensity on MRI T1WIs and low signal intensity on T2WIs. Our case had the same imaging findings, with branches of the renal artery penetrating the tumor. If the renal tumor has these radiological findings, the tumor may be IPT.
AB - Inflammatory pseudotumor (IPT) is a quasineoplastic lesion that most commonly involves the lung and the orbit; kidney involvement is rare. We report a case of inflammatory pseudotumor of the kidney. The patient was a 61-year-old man who presented with no symptoms. Nonenhanced computed tomography (CT) demonstrated an ill-defined, isodensity mass measuring 3.5∈cm in the lower portion of the left kidney. Contrast-enhanced CT showed that branches of the renal artery without encasement penetrated the tumor; there was a little enhancement in the mass on the arterial phase and homogeneous enhancement on the venous phase. On magnetic resonance imaging the mass showed intermediate signal intensity on T1-weighted images (T1WIs) and low signal intensity on T2WIs. Most IPTs of the kidney appear as an ill-defined, hypovascular, homogeneous tumor on CT images, with variable signal intensity on MRI T1WIs and low signal intensity on T2WIs. Our case had the same imaging findings, with branches of the renal artery penetrating the tumor. If the renal tumor has these radiological findings, the tumor may be IPT.
KW - CT
KW - Inflammatory pseudotumor
KW - Kidney
KW - MRI
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U2 - 10.1007/s11604-007-0174-y
DO - 10.1007/s11604-007-0174-y
M3 - Article
C2 - 18085406
AN - SCOPUS:40349114552
SN - 0288-2043
VL - 25
SP - 541
EP - 547
JO - Radiation Medicine - Medical Imaging and Radiation Oncology
JF - Radiation Medicine - Medical Imaging and Radiation Oncology
IS - 10
ER -