 They examined Chenar's paraffin blocks of the tumor, stained specimens of it and Whitman's other brain tissue, in addition to the remainder of the autopsy specimens available.Following a three-hour hearing on August 5, the Commission concluded that Chenar's finding had been in error.They found that the tumor had features of a glioblastoma multiforme, with widespread areas of necrosis, palisading of cells, and a "remarkable vascular component" described as having "the nature of a small congenital vascular malformation".