Middleton et al prospectively evaluated men for testicular microlithiasis using ultrasonography. The authors are from Washington University in St. Louis, Missouri.
Parameters:
(1) maximum number of microliths in one image from the left testis
(2) maximum number of microliths in one image from the right testis
(3) total number of microliths in the left and right testis
Maximum Number in an Image
Total Number
Type of Testicular Microlithiasis
> 5
NA
classic (CTM)
1 - 5
>= 1
limited (LTM)
The frequency of CTM was 1 in 27 males.
The frequency of LTM was 1 in 7 males.
The frequency of a testicular tumor in a patient with CTM or LTM is n the range of 5-10%, which is significantly less than previous estimates of 30-40% (which may have been subject to selection bias associated with retrospective analysis).
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