Young Female With Gingival Lesion of Intraoral Osseous Choristoma: A Rare Case Report.

Choristoma is a mass of tissue with normal histology similar to a part of the body that is different from the one in which it is located. It differs from the hamartomatous group of pathology which is normal tissue, but disorganized, found in an abnormal location. Documentation of the occurrence of osseous choristoma lesions in the oral cavity has been scarce, and most of the cases have been reported in the tongue. It is very seldom to arise from the interdental gingiva. Indeed, choristoma is considered a developmental anomaly, involving younger individuals, although many cases among older adults have been reported. The differential diagnoses include cartilaginous metaplasia, pleomorphic adenoma, salivary gland tissue, and the lesions of inflammatory or traumatic origin that may give rise to hamartomas in the oral cavity. In this case report, we present a case of osseous choristoma arising from the mandibular, posterior buccal gingiva in a young female patient.