56 Renal Calcification

CLINICAL IMAGAGINGAN ATLAS OF DIFFERENTIAL DAIGNOSIS

EISENBERG

DR. Muhammad Bin Zulfiqar PGR-FCPS III SIMS/SHL

• Fig GI 56-1 Bilateral staghorn calculi.

• Fig GI 56-2 Milk-alkali syndrome causing nephrocalcinosis.

• Fig GI 56-3 Medullary sponge kidney.

• Fig GI 56-4 Lipoid pneumonia. Multifocal areas of consolidation in the right lung containing areas of fat attenuation. (Courtesy of Michael B. Gotway, MD, Scottsdale, A Z.)

• Fig GI 56-5 Simple renal cyst. Curvilinear, peripheral calcification outlines part of the cyst wall (arrows). Smooth splaying of upper pole calyces is demonstrated on this film from an excretory urogram.71

• Fig GI 56-6 Calcification in a renal cell carcinoma. If there is no peripheral calcification, mottled or punctuate calcium that appears to be within a mass is highly indicative of a malignant lesion.72

• Fig GI 56-7 Xanthogranulomatous pyelonephritis. Several large radioplaque calculi at the ureteropelvic junction and in the proximal ureter on the right (open arrows). The closed arrow points to an opacified gallbladder. At excretory urography, the right kidney showed no function.

• Fig GI 56-8 Calcification in a renal artery aneurysm. (A) Plain abdominal radiograph demonstrates the circular calcification with a cracked-eggshell appearance at the renal hilum. (B) Selective right arteriogram shows contrast material filling the saccular aneurysm (arrow).

• Fig GI 56-9 Renal milk of calcium. On an upright view, the calcium-containing sediment gravitates to the bottom of the renal cyst, resulting in the characteristic half-moon contour.

• Fig GI 56-10 Congenital unilateral multicystic kidney. There are three peripherally calcified masses, with no excretion of contrast material on excretory urography.72