Benign and malignant lymphadenopathy may exhibit mild (mean, +6 HU) to pronounced (mean, +61 HU) enhancement after intravenous administration of iodinated contrast material with maximal enhancement occurring 1 to 2 minutes after injection.

long black arrow=rim enhancement.

short black arrow=heterogenous enhancement.

this case is renal cell carcinoma.

Reference:BiblioMed Textbook-Computed Body Tomography

febrile patient
abscess=fluid+enhancing rim+septation

large mass with internal echoes.
CT without contrast revealed hypo-dense
mass with CT density 10 HU

the mass does not enhance but with
enhancing rim.

more caudally a septum is evident.

extensive gas collection into left renal

parenchyma ,left peri-nephric space

, left and right anterior para-renal

spaces.

arrows=focal heterogenous lesion

thickening of fascia.

swelling of right kidney.

arrow=enhanced mural nodule

with calcification.

extensive retro-peritoneal adenopathy

with extension into right kidney.

tumor thrombus within IVC.

cystic type



cystic type

contrast film showed multiple septations.

non contrast fil showed complex mass.

bilateral renal cysts.

angiomyolipoma(arrow).

acquired renal cysts with small renal cell

carcinoma(arrow)

hemodialysis for 16 years resulted in bilateral

calcified renal cysts.

cyst wall calcification

fleck of calcium in the septum(arrow).

layering of contrast into diverticulum.

simple renal cyst with fleck of calcification.