Lingual Osseous Choristoma: Case report and literature review of this rare entity

Abstract

Intraoral osseous choristoma represents a benign lesion of growing ectopic bone in the soft tissues of the oral cavity. It is considered as rare entity while fewer than 100 cases have ever been reported worldwide. Nevertheless, the pathogenetic mechanism that drives this abnormal ossification still remains controversial. In the present study a case of lingual osseous choristoma in a 50-year old male is presented. The patient was treated with surgical excision and no recurrence was observed. In addition epidemiology, clinical presentation, and pathogenesis are reviewed, serving as a reminder of this rare pathology. Key words: Osseous choristoma, osteoma, tongue.

Osseous Choristoma of the Tongue: A Case Report

“…The treatment of choice is a surgical excision under local or general anesthesia depending on clinical judgement, considering tumor localization and patient age. There are two reported recurrences for osseous choristoma, one of a buccal soft tissue presented by Long (1991) and another one of the masseter muscle described by Dalkiz (2001) [8,7,11] . Until now, there is no reported recurrence or malignant transformation for lingual osseous choristoma.…”

Osseous choristoma: Report of a case on the palate and a literature review

“…Several studies have been conducted to unravel the etiology of osseous choristomas. Previous research suggested a congenital basis for these lesions 25,30 . The tongue is formed by the fusion of two parts: the anterior two‐thirds of the tongue is derived from the first branchial arch, while the posterior third is from the third branchial arch.…”

“…The developmental theory posits that oral choristoma arises from the entrapment of branchial arches I, II, and III derivatives in the facial region. As most lesions are located at the midline, this explanation appears plausible 30 . However, this theory falls short of providing a complete understanding of the full range of lingual or other intraoral osseous choristomas and the higher incidence of such lesions in females 23,32 .…”

“…Previous research suggested a congenital basis for these lesions. 25 , 30 The tongue is formed by the fusion of two parts: the anterior two‐thirds of the tongue is derived from the first branchial arch, while the posterior third is from the third branchial arch. These branchial arches also give rise to normal osseous structures such as the hyoid bone, malleus, incus, and styloid process, through a process called endochondral ossification.…”

“…As most lesions are located at the midline, this explanation appears plausible. 30 However, this theory falls short of providing a complete understanding of the full range of lingual or other intraoral osseous choristomas and the higher incidence of such lesions in females. 23 , 32 Environmental factors have also been proposed to contribute to intraoral osseous choristoma development, challenging the congenital viewpoint.…”