Milk of calcium in renal cysts: New sonographic features

H. C. Yeh, H. A. Mitty, K. Halton, R. Shapiro, J. G. Rabinowitz

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Milk of calcium (MOC) in a small renal cyst or calyceal diverticulum is quite common. Ninety-one small renal cysts with MOC in 61 patients were found within a period of 4 years and 7 months. The main sonographic features are echogenic material layering in the dependent portion of a cyst, associated with reverberation echoes without shadowing. Shadowing was seen when MOC was present in larger amounts. Because MOC is usually asymptomatic and requires no treatment, differentiation from other lesions such as calculi or angio-myolipomas is important for proper patient management. MOC is detected more readily by ultrasonography than by radiography or CT.

Original languageEnglish
Pages (from-to)195-203
Number of pages9
JournalJournal of Ultrasound in Medicine
Issue number5
StatePublished - 1992


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