Divide into right and left halves - Subsection at 3 mm intervals, starting closest to rest of prostate. The first transverse cut perpendicular to rectal surface is 6 mm thick. Submit as RZ, MZ, LZ . It may be often less than 3 mm thick. Label it III rather than with a letter.
Every section is placed in a cassette with surface toward apex facing down .
String the slices together to maintain the orientation.