The Grody Turf-Osseous Choristoma

Choristoma is defined as a tumour-like proliferation of normal tissue which appears localized within an ectopic or anomalous location. Initially scripted by Albrecht in 1904, choristoma exemplifies a “tumour-like lesion” which is essentially comprised of normal tissue confined to an aberrant region [1]. Subsequently, Monserrat in 1913 defined a bone-forming neoplasm of the tongue designated as “lingualosteoma” [2]. Choristoma is composed of proliferating, histologically normal tissue which accumulates within an aberrant anatomic site. Thus, choristoma is essentially denominated by a tumour-like mass constituted of normal cells confined to an anomalous location. Choristoma of the oral cavity is infrequent and preponderantly composed of bone or cartilage. Nevertheless, choristoma may be comprised of peripheral glial tissue, sebaceous glands or gastrointestinal tissue. Choristoma is generally devoid of  salivary gland ductal tissue or a myoepithelial component.