**3. What are the potentially malignant disorders of the oral and maxillofacial region?**

Usually, the clinical appearance regarding oral cancer is tremendously varied along with symptoms as well as signs, which are very often related to the primary tumor. Several cause are responsible to generate oral cancer for instance oral cavity lesion, ulcerated lesion, mobile teeth, bleeding, pain or numbness in the mouth or face, illfitting dental prosthesis could cause oral cancer. Leaving apart, viral lesions (warts), and even white lesions can be considered as malignant on biopsy. Erythematous (abnormal redness of mucous membrane) lesion, which is found during biopsy of erythroplakia, can also induce suspicion of oral cancer. However, various potentially malignant disorders of the oral and maxillofacial region are listed in the **Table 1** below [18]:

Some of the potentially malignant disorders of the oral and maxillofacial region, which has the potency for the malignant transformation will be discussed in this chapter.
