Thirty cases of adenomatoid odontogenic tumour (AOT) from the files of Dept. of Oral Pathology, Dr. R. Ahmed Dental College, Calcutta are presented along with a through review of the literature for the lesion. The higher occurrence in males than females are being reported for the first time. Patterns of eosinophilic material have been recognised and represented diagrammatically. Very few cases have been reported from India and by far this is the largest series of AOT from this country.