Zopf in 1885 proposed a scheme based on the acceptance of extreme views of pleomorphism; his system, however, was extraordinarily A FIG.
B. fragilis is a Gram negative short bacillus which demonstrates pleomorphism.
From that time the question of the pleomorphism (mutability of shape) of the bacteria has been hotly discussed; but it is now generally agreed that, while a various forms of bacteria and the and their arrangement.
The nuclei of the cells show pleomorphism, with variation in size, shape and chromatin staining pattern.
The histology of the tumor, including nuclear pleomorphism and the mitotic count, are of no value in predicting clinical outcome.