Commonly known as a dental<unk> , the<unk>  is the most common odontogenic<unk> . It may develop rapidly from a<unk>  granuloma, as a consequence of untreated chronic<unk>  periodontitis.<unk>  is defined as "the tissues surrounding the apex of the root of a tooth" and a<unk>  is "a pathological cavity lined by epithelium, having fluid or gaseous content that is not created by the accumulation of pus." Most frequently located in the maxillary anterior region, the<unk>  is caused by pulpal necrosis secondary to dental caries or trauma. Its lining is derived from the epithelial cell rests of Malassez which proliferate to form the<unk> . Such<unk> s are very common. Although initially asymptomatic, they are clinically significant because secondary infection can cause pain and damage. In radiographs, the<unk>  appears as a radiolucency (dark area) around the apex of a tooth's root.
Periapical cyst
Subareolar abscess
Nabothian cyst
Proliferating trichilemmal cyst
Keratin implantation cyst
Trichilemmal cyst
Limbal nodule
Genu recurvatum