a correlation between the degree of anaplasia with the dna pattern was difficult to pursue in two spinal ependymomas obviously lacking microscopical mitoses : both -- one a so-called tanycytic variant of grade i -- ii , and the other probably a metastasis from a cerebellar tumour -- had a clear polyploid dna histogram with a strikingly increased proliferation index , similar to the more malignant tumours of grade iii .
C0012854
dna
C0000702
a