A Winding Journey In The Nomenclature Of Odontogenic Keratocyst and a Revisit of the Four Editions Of The WHO Classification On Odontogenic Cyst And Tumours

The OdontogenicKeratocyst has been a controversial odontogenic developmental cyst that has seen changes in terminology ever since its first description. The change in its terminology from being a simple cyst to a benign tumour was much debated when WHO rechristened it to KeratocyticOdontogenicTumour in 2005. The widespread debate on this issue lead to reverting the name back to OdontogenicKeratocyst by WHO in 2017. This article reviews the changes in its nomenclature and discusses the reasons that led to these changes. The article also includes all the four WHO classifications of Odontogenic lesions from 1971 to 2017 so that the reader may at a glance be able to summarize how the classification has evolved and changed over the last four decades.