Osseous choristoma of the tongue: two case reports

Abstract

BackgroundOsseous choristoma is a very rare, benign lesion in the maxillofacial region. It appears as a benign mass of normally matured bony tissue covered by the normal epithelium of the tongue. It is usually seen in front of the foramen cecum of the tongue. Surgical excision is the treatment of choice with an excellent prognosis and there have been very few cases of recurrence.Case presentationHere we present two cases of osseous choristoma on the dorsum of the tongue. Case 1 was a 15-year-old Japanese girl who presented with a painless but gradually growing swelling on the dorsum of her tongue approximately 1 year before her admission. Case 2 was a 21-year-old Japanese woman with a complaint of pain in the lower left, posterior side of her mouth. Histological findings showed that both lesions were composed of well-organized, mature, compact bone beneath the oral mucosal membrane. Subsequent to simple surgical excision, no recurrence of the lesions was observed after the follow-up period. Previous literatures have proposed both malformation and trauma hypotheses as the etiopathologies of osseous choristoma. However, the histopathological findings of the two cases in the present study do not support the trauma hypothesis.ConclusionsAlthough osseous choristoma is clinically a benign condition, the underlying histopathological processes are important. The outcome of aberrant formation of calcified tissue in the vicinity of vital structures such as nerves and blood vessels may be of clinical significance.

A Case of an Incidentally Removed Lingual Osseous Choristoma

“…e treatment of lingual osseous choristoma is surgical excision. Although recurrence of osseous choristomas of the masseter muscle has been reported [20], there have not been reports on the malignant evolution of lingual osseous choristomas thus far [7]. To our knowledge, our patient is the first reported case of a lingual osseous choristoma that was incidentally removed and cured without surgical interventions.…”

“…Less than 100 cases of osseous choristomas of the oral and maxillofacial region have been reported in the English language literature, and the most common site is the tongue, especially the dorsal posterior third of the tongue near the foramen caecum and circumvallate papillae [5]. Gorini et al provided a comprehensive review of 67 cases of the lingual osseous choristomas [6], and eight additional cases of osseous choristoma of the tongue were reported since their review [5,[7][8][9][10][11][12]. Including newly reported cases and our case, the patients' age ranged from five to eighty-nine years (mean: 28.9), with majority of the patients being in the second or third decades of life, and a strong female predilection (male : female, 19 : 50) was observed.…”

Lingual Osseous Choristoma: A Case Report and Review of the Literature

“…Recurrence after excision is not expected. In the literature, recurrence of two cases of osseous choristoma has been reported [12].…”

Lingual Osseous Choristoma of the Tongue Base: Unusual Presentation of a Rare Entity

“…The most frequent affected site was the posterior dorsal tongue near the circumvallate papillae [ 1 ]. Since their review in 2014, only four additional cases of lingual osseous choristoma were reported, excluding the current case [ 2 – 4 ]. Adhikari et al described two cases occurring on the dorsal tongues of a 15-year-old female and a 21-year-old female [ 2 ].…”

“…Since their review in 2014, only four additional cases of lingual osseous choristoma were reported, excluding the current case [ 2 – 4 ]. Adhikari et al described two cases occurring on the dorsal tongues of a 15-year-old female and a 21-year-old female [ 2 ]. Davidson et al reported a case occurring on the tongue base in an 11-year-old male [ 3 ].…”