Angiomyolipoma CT: Difference between revisions

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Revision as of 17:51, 24 September 2015

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor-In-Chief: Cafer Zorkun, M.D., Ph.D. [2]

Abdominal CT scan may be diagnostic for angiomyolipoma. On CT scan, angiomyolipoma is characterized by:^[1]

CT images demonstrate a large kidney angiomyolipoma

CT images demonstrate a large liver angiomyolipoma

@@ Line 5: / Line 5: @@
 ==Overview==
 ==CT Scan==
+Abdominal CT scan may be diagnostic for angiomyolipoma. On CT scan, angiomyolipoma is characterized by:<ref name="pmid14990834">{{cite journal| author=Kim JK, Park SY, Shon JH, Cho KS| title=Angiomyolipoma with minimal fat: differentiation from renal cell carcinoma at biphasic helical CT. | journal=Radiology | year= 2004 | volume= 230 | issue= 3 | pages= 677-84 | pmid=14990834 | doi=10.1148/radiol.2303030003 | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=14990834  }} </ref>
-Most lesions involve the cortex and demonstrate macroscopic fat (less than -20 HU). When small, volume averaging may make differentiation from a small cyst difficult.
+*Homogenous enhancement on both corticomedullary and excretory phase scans
+*Negative attenuation on unenhanced [[CT scan]]
-It is important to realise that a proportion of angiomyolipomas are fat-poor. This is especially the case in the setting of tuberous sclerosis, where up to a third do not demonstrate macroscopic fat on CT 6. Calcification is rare.
+*Low intratumoral fat component
+*Rarely calcification may be present
-Demonstration of fat in renal tumor is virtually diagnostic of angiomyolipoma. Most small lesions are asymptomatic and incidental findings on images. The fat density of the tumour on [[CT]] is [[pathognomonic]].
 [http://www.radswiki.net Images courtesy of RadsWiki]