The most commonly occurring odontogenic cysts of the jaws are radicular cysts. Causes of jaw cysts are different, numerous and depend on the type of cyst. The basic precondition for the occurrence of a cystic lesion is the previous presence of epithelial tissue at the site of future development of the cystic formation. Radicular cysts are one of the most common odontogenic cysts and arise from epithelial so-called Malassez - these residues in the periodontal tissue, as a consequence of inflammation of the pulp. They can occur at any age, and are equally prevalent in both sexes. The aim of this paper is to present the clinical symptoms and treatment of a radicular cyst in a 12-year-old child. The treatment of radicular cysts in most cases is surgical. The possibilities for such treatment and the choice of surgical method depend on the size of the cyst, its location, and the pathological formation.   The present article reported a case of a 12-year-old male with the chief complaint of  pain on the right lower back tooth region. The radiographic examination revealed the presence of a well-defined radiolucency surrounded by a corticated border between   mandibular central incisive.  The case was managed by complete enucleation under local  anesthesia without extraction of any teeth. We chose enucleation (cystectomy) as a surgical procedure as the method of choice, because postoperative complications are the rarest, and the best healing is also provided. Аfter one month of surgery treatment, complete wound healing was recorded at the clinical control at the Department for oral surgery.