PMC3921799_01
Supine non-contrast CT scan. Left Kidney: Milk of calcium (MOC) seen layering out in a left anterior renal cyst.
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F0001
A critical review of the x-ray films resulted in a CT scan being performed which demonstrated a left renal cyst containing calcium layering out in a dependent fashion, apparent in both the supine and prone images (Fig. 1).
PMC3921799_02
Prone non-contrast CT scan, section through the kidneys. Left kidney: Dense material (milk of calcium) layers out in a dependent fashion with a stark fluid-fluid level.
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F0002
A CT scan was performed and suggested the presence of bilateral renal cysts with a calcium fluid interface characteristic of MOC cysts (Fig. 2).
PMC3921799_03
Prone non-contrast CT scan, section through the kidneys. Right kidney: Milk of calcium (MOC) layers out in the anterior renal cyst. It is impossible to determine whether the low attenuation lesion is a cyst or a diverticulum on these unenhanced scans.
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F0003
Given that he was known to have a pelvicalyceal cyst, a CT scan was requested and confirmed the presence of calcium fluid interface with characteristic layering, in addition to a few small calculi with the cyst (Fig. 3).
PMC3921799_04
Prone non-contrast CT scan. Left kidney: Low attenuation cyst in the anterior cortex of the left kidney demonstrating layering out of milk of calcium (MOC) in the prone position.
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F0004
CT demonstrated a 14 mm left parapelvic cyst showing no significant enhancement (-2 to -3 Hounsfield units) with characteristic layering in a dependent fashion, apparent in both the supine and prone images consistent with MOC cysts (Fig. 4).
PMC3921799_05
Supine non-contrast CT scan, axial section through the kidneys. Low attenuation cyst in the posterior cortex of the right kidney contains milk of calcium (MOC), layering out with fluid-fluid level.
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F0005
A non-contrast CT scan confirmed the presence of a 2.5 cm cyst in the right posterior superior renal cortex with a fluid interface and characteristic calcific layering posteriorly in the supine position (Fig. 5).