eng Oriental Scientific Publishing Company Biomedical and Pharmacology Journal 0974-6242 2016-08-21 9 2 833 835 10.13005/bpj/1012 8072 article M. K. Masthan 1 E. Rajesh 1 U. Tamilarasi 1 N. Anitha 1 Dept of Oral Pathology, Sree Balaji Dental College and Hospital, Bharath University, Pallikaranai, Chennai-600100. Pathologist  assess oral precancerous lesions with their  dysplastic features  by grading of oral epithelial dysplasia (OED) .Evaluating of precancerous lesion arises from two factors (1) lack of knowledge in  predicting future development of cancer. (2) Lack of  evaluating the criteria which is already established.  This article  provide a detail review of all the grading systems. https://biomedpharmajournal.org/vol9no2/grading-of-oral-epithelial-dysplasia-a-review/ epithelial dysplasia  precancerous  photographic