Document Detail

MRI findings of angiomyolipoma of the renal sinus in 5 cases.
MedLine Citation:
PMID:  21084909     Owner:  NLM     Status:  MEDLINE    
The magnetic resonance imaging (MRI) appearance of 5 cases of angiomyolipoma (AML) centered in the renal sinus is presented. All cases exhibited similar imaging findings, including well-circumscribed margins, minimal perceived enhancement without soft tissue components, insinuation around the renal collecting system, and localized hydrocalicosis with associated localized renal parenchymal atrophy but without generalized hydronephrosis. Findings in some cases included extension out of the renal sinus and presence of aneurysmal vessels. Although identification of a renal parenchymal defect has been reported to be useful for the differentiation of a large exophytic AML from a perirenal liposarcoma, none of the cases in our series demonstrated this finding on MRI. To our knowledge, there have been only 2 previous reported cases showing the cross-sectional imaging appearance of an AML of the renal sinus without a renal parenchymal defect. In view of the shared and characteristic imaging features of the 5 cases in our series, we believe that the diagnosis of this condition can be strongly suggested by MRI despite the absence of a visible parenchymal defect. While histology remains the only way to definitively establish the diagnosis, the typical imaging appearance of this entity should enable conservative management with follow-up imaging in an asymptomatic patient. In some cases, embolization and needle biopsy could be used to avoid a surgical approach.
Amita Kamath; Andrew B Rosenkrantz; Morton A Bosniak
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of computer assisted tomography     Volume:  34     ISSN:  1532-3145     ISO Abbreviation:  J Comput Assist Tomogr     Publication Date:    2010 Nov-Dec
Date Detail:
Created Date:  2010-11-18     Completed Date:  2011-01-10     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7703942     Medline TA:  J Comput Assist Tomogr     Country:  United States    
Other Details:
Languages:  eng     Pagination:  915-20     Citation Subset:  IM    
Department of Radiology, NYU Langone Medical Center, New York, NY 10016, USA.
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MeSH Terms
Angiomyolipoma / diagnosis*,  pathology
Contrast Media / diagnostic use
Gadolinium DTPA / diagnostic use
Kidney Neoplasms / diagnosis*,  pathology
Magnetic Resonance Imaging / methods*
Middle Aged
Retrospective Studies
Reg. No./Substance:
0/Contrast Media; 80529-93-7/Gadolinium DTPA

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