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The jaw cysts are intraosseous lesions of varied etiology and special histological structure which is characterized by the presence of an envelope that can be keratinized or not. The content might be liquid or semi-liquid. Inflammatory cysts are the most frequent among the jaw-s cysts. This variety includes the radicular, residual and paradental cysts. Each type of these cysts has its own features. The aim this paper is to present a literature review on the clinical, radiological and pathological aspects of the inflammatory cysts of the jaws. [ABSTRACT FROM AUTHOR]

After having reviewed the literature in the first part of this paper, we now present 6 selected cases to confirm the malignant potential of oral lichen planus (OLP), illustrating their particularities. Malignant transformation probably favored by chronic inflammation present in OLP is considered to arise in a small percentage in late stages (such as atrophic OLP or post-lichen state), but the true prevalence is probably underestimated because these lesions are often considered to be leukoplakia. Clinically malignant transformation will present as multiple lesions (verrucous carcinoma or squamous cell carcinoma), more or less spaced in time and often preceded by OIN (oral intraepithelial neoplasia). [ABSTRACT FROM AUTHOR]