A follicular or also called dentigerous cyst surrounds the crown of a yet non- (or partially) erupted tooth. It develops due to fluid accumulation between the crown and the reduced enamel epithelium. Mostly the third molar or the upper canines are involved. Normally, comn cysts remain and grow initially asymptomatic unless the cyst contents get infected, pain, pus and/or colour changes of the overlaying mucosa result. The color varies from blue-black, purple, bluish to transparent. The radiography shows a well-demarcated radiolucent, unilocular lesion surrounding the crown of the erupting tooth. Therapy lies in cyst enukleation and tooth removal as the circumstances require. But, in most cases, the cysts disappear spontaneously and the teeth are able to erupt in normal patterns without further treatment.