- Pathology material (hematoxylin and eosin [H&E] stain, immunohistochemistry [IHC] and pathology report from initial diagnosis, if slides are not available, then 8 unstained slides of 4 micron thickness or a representative block should be sent) will be reviewed, and the diagnosis confirmed by University Nebraska Medical Center (UNMC) pathology department (retrospective diagnostic review: treatment may commence prior to the UNMC review)