osseous choriostoma of the upper lip

Introduction:choristoma is a non-neoplastic growth of normal tissues in non-indigenous site of origin. osseous choristoma is an ectopic bone formation which is a rare entity with 72 cases has been reported in the tongue, 15 cases in the buccal mucosa, 1 case in the lower lip. case report:a 43 year old male patient experienced a mild, intermittent, dull aching type in the upper lip. an excisional biopsy was done by placing a single incision under local anesthesia. to our knowledge case is first to be reported in the upper lip as a result of reactive pathogenesis. conclusion:as per literature, surgical excision is the treatment of choice for osseous choristoma. malignant transformation has not been reported yet.