minimally thickened, smooth, minimal enhancement possible
thickened, irregular, enhancing
Septa
∅
few, hairline-thin, ∅ enhancement
multiple, minimally thickened, minimal enhancement possible
thickened, irregular, enhancing
Calcifications
∅
fine or short segment slightly thickened
thick or nodular
Density
water density
high attenuation (> 20 HU)
Totally intrarenal (n/a)
no
yes
3cm or larger (n/a)
no
yes
Enhancing soft-tissue component
no
yes
Text Module
Additional Info
A homogeneous mass ≥ 70 HU at unenhanced CT is consistent with a high-attenuation renal cyst.
Sources
Israel GM, Bosniak MA. How I do it: evaluating renal masses. Radiology 2005 Aug;236(2):441-50. DOI: 10.1148/radiol.2362040218
Jonson A, Rubinowitz AN, Mutalik PG, et al. Can high-attenuation renal cysts be differentiated from renal cell carcinoma at unenhanced CT? Radiology 2007 May;243(2):445-50. DOI: 10.1148/radiol.2432060559