Microliths in hpg and hpg .ARKO mice. Tissue sections showing microliths in hpg.ARKO (A, B, C) and hpg (D) mice. In A) the microliths are identified by yellow arrows. In C) and D) the white arrows identify Sertoli cells apposed to the microliths. The line represents 100 μm in A) and 10 μm in B)-D).