Acquired Abnormality
periodontal cyst
per·i·o·don·tal cyst
Subclass of:
Periodontal Diseases; Odontogenic Cysts
Definitions related to periodontal cyst:
  • An epithelium-lined sac containing fluid; usually found at the apex of a pulp-involved tooth. The lateral type occurs less frequently along the side of the root.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
  • (inflammatory collateral cyst) A cyst that arises on the buccal aspect of the roots of partially or recently erupted teeth as a result of inflammation in the pericoronal tissues. (WHO 2017)
    NCI
    U.S. National Cancer Institute, 2021
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