LAUSR

Highlights • Lateral periodontal cyst [LPC] is a rare developmental odontogenic cyst.• It is difficult to differentiate a LPC from a cyst of endodontic origin by clinical and radiographic methods. Histopathological evaluation is the only method to confirm diagnosis.• Usually seen in association of a vital tooth, but in this case it was seen in a non-vital tooth.• LPC is usually seen within bone, but in this case besides Intrabony component there was a gingival presentation as a swelling.