Kramer Ivor R.H., Pindborg J.J., Shear M. Histological Typing of Odontogenic Tumours

2nd Ed. — Springer, 1992. — 124 p.Over the years there have been many attempts to produce a 'logical' classification of tumours and tumour-like lesions of the odontogenic tissues. Recent advances in our understanding of the origins and the interactions of these tissues have provided a sounder scientific basis for classification, but uncertainties remain, partly because of the complexity of the tissues involved and partly because the rarity of some lesions makes it difficult to accumulate a large series for study and comparison.
The classification used here is based firstly on tumour behaviour, with a broad division into lesions generally regarded as 'benign' and those regarded as 'malignant', the 'benign' category includes a number of entities that are probably or certainly non-neoplastic.
Subdivisions of the 'benign' lesions are then based on the types of odontogenic tissues involved: odontogenic epithelium without odontogenic ectomesenchyme odontogenic epithelium with odontogenic ectomesenchyme; odontogenic ectomesenchyme with or without included odontogenic epithelium. The word 'included' in the latter group is intended to indicate that, although epithelium may be present, it sometimes appears to be included by chance rather than playing any essential role in the pathogenesis of the lesion. Lesions made up of odontogenic epithelium with odontogenic ectomesenchyme have the elements necessary for inductive interactions leading to the formation of dentine and then enamel. Whether or not these dental hard tissues are found in any individual case depends in part on the stage at which the lesion is excised, and in part
on factors that are not yet understood. It is possible that some of the lesions given separate designations in the present classification are
simply chronological stages in the evolution of a single type of tumour; until larger numbers of examples have been studied, it is suggested that they should be placed into the separate categories provided, so that differences in presentation and behaviour may be more easily assessed.Histofogical Classification of Odontogenic Tumours
Definitions and Explanatory Notes
Neoplasms and Other Tumours Related to the Odontogenic Apparatus
Neoplasms and Other Lesions Related to Bone
Epithelial Cys