[GROUP 1: Signs and symptoms] - Occurs in people under the age of 25, particularly males - Involves the permanent mandibular molars or premolars - Involved tooth usually has a vital pulp - Attached to the tooth root and may cause resorption - Usually asymptomatic, but may be associated with diffuse pain and tooth mobility

[GROUP 2: Diagnosis] - Radiograph appearance: well-defined, markedly radiopaque mass - Radiolucent peripheral line overlies and obliterates the tooth root - Rounded or sunburst appearance - Apparent external resorption of the root where the tumor and root join - Consider differential diagnosis with severe hypercementosis and chronic focal sclerosing osteomyelitis

[GROUP 3: Treatment] - Surgical enucleation of the lesion - Depending on clinical circumstances, may involve removal of the involved tooth - Incomplete removal may lead to recurrence - Some surgeons advocate curettage after tooth extraction to decrease recurrence rate

[GROUP 4: Related Concepts] - Cementum - Cementogenesis - Cementoblast

[GROUP 5: References] - Silva, Brunno Santos Freitas et al. (2017). 'Differential diagnosis and clinical management of periapical radiopaque/hyperdense jaw lesions.' Brazilian Oral Research, 31: e52 - Sankari Leena S, Ramakrishnan K (2011). 'Benign cementoblastoma.' Journal of Oral and Maxillofacial Pathology, 15 (3): 358–360 - Huber AR, Folk GS (2009). 'Cementoblastoma.' Head Neck Pathol, 3 (2): 133–5 - External links: Classification, ICD-10: D16.4-D16.5, ICD-9-CM: 213.0-213.1