Radicular cysts are the most common odontogenic cyst of anterior maxilla, not regularly comprehended in youth. They are
found mostly at the apices of the tooth (periapical cyst), lateral surface of the rots (lateral radicular cyst) and remains in the
jaw after removal of the offending tooth (residual cyst). It is an inflammatory cyst, as an outcome to pulpal necrosis succeeding
caries, with a linked periapical inflammatory reaction. It is associated most commonly with the root apex of a non-vital tooth.
They advance sluggishly and asymptomatic lest infected. Because of this they can extent to a big dimensions. Many times it is
perplexing to segregate radicular cysts from the obligatory pre-existing chronic periapical periodontitis lesions radio graphically.
Here, we present a case of radicular cyst in relation to 2nd premolar (45) of the mandible in a 29 year old male patient. IOPAR
and OPG shows a unilocular radiolucency with a well-defined border in the periapical region of the 2nd premolar on the right
side. We also discussed clinical, radiographic, histopathological and therapeutic features of the case with a post-operative
follow up to see the recurrence occurs or not.