Radicular Cyst Associated with Regional Odontodysplasia in the Mandible of a 12-Year-Old Girl: A Case Report

The radicular cyst is the most common dental cyst, often asymptomatic, and primarily observed in men in their 30s and 40s, particularly in the anterior maxilla. If left untreated, complications such as tooth displacement and swelling may occur. Treatment options for this cyst include enucleation, marsupialization, or a combination of both. This disorder is more common in males and typically affects the anterior region, particularly the maxilla. A 12-year-old girl presented with jaw swelling and delayed eruption of permanent mandibular teeth. The patient reported a history of jaw trauma at the age of 4. On intraoral examination, swelling was observed on the left side of the mandible in the edentulus space of teeth 31–35, extending from the ridge level to a depth of 5 mm in the labial vestibule. The surface of the swelling was smooth and pink, matching the color of the healthy mucosa, with a firm consistency. The lesion measured approximately 1 × 3 cm. A cyst with hyperplastic follicles and phantom teeth was observed in the panoramic radiograph. This report presents a rare case of a radicular cyst associated with regional odontodysplasia. Early diagnosis and appropriate management of such cysts in children, particularly when permanent teeth are affected, are essential to ensure optimal functional and developmental outcomes.