A 3-5 mm testicular biopsy should be fixed in one to two hours. Be sure to
rinse out as much yellow picric acid as possible (you can use running water
or 70% alcohol ). The basophilia of chromatin in the stored block will
deteriorate after some time if there is picric acid  residue.

Jeff Silverman HT HTL QIHC (ASCP)
Southside Hospital
Bay Shore NY


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