The lateral periodontal cyst (LPC) is a relatively uncommon but widely recognized odontogenic cyst of developmental origin. It appears on radiographs as a round or teardrop-shaped, well-circumscribed radiolucency shadow. Due to its location it can easily be misdiagnosed as one of lesions of endodontic origin (LEOs) caused by accessory canals. The healthy dental pulp is protected from oral microorganisms by enamel and dentin. Exposure of the dental pulp to microorganisms and their by-products, may elicit both nonspecifically and specifcally immunological reactions in the periradicular tissues result as lesions of endodontic origin. These lesions, such as radicular abscess, cyst or granuloma, sometimes may mimic the lateral periodontal cyst. This article reviewed the differential diagnosis between LPC and LEOs, and discussed the possible management of those of lesions as well.
The lateral periodontal cyst (LPC) is a relatively uncommon but widely recognized odontogenic cyst of developmental origin. It appears on radiographs as a round or teardrop-shaped, well-circumscribed radiolucency shadow. Due to its location it can easily be misdiagnosed as one of lesions of endodontic origin (LEOs) caused by accessory canals. The healthy dental pulp is protected from oral microorganisms by enamel and dentin. Exposure of the dental pulp to microorganisms and their by-products, may elicit both nonspecifically and specifcally immunological reactions in the periradicular tissues result as lesions of endodontic origin. These lesions, such as radicular abscess, cyst or granuloma, sometimes may mimic the lateral periodontal cyst. This article reviewed the differential diagnosis between LPC and LEOs, and discussed the possible management of those of lesions as well.