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LETTER TO EDITOR Table of Contents   
Year : 2010  |  Volume : 53  |  Issue : 2  |  Page : 373
Choristomas of the oral cavity


Gian Sagar Medical College and Hospital, Ramnagar, Banur, Punjab, India

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Date of Web Publication12-Jun-2010
 

How to cite this article:
Bansal R. Choristomas of the oral cavity. Indian J Pathol Microbiol 2010;53:373

How to cite this URL:
Bansal R. Choristomas of the oral cavity. Indian J Pathol Microbiol [serial online] 2010 [cited 2019 Nov 21];53:373. Available from: http://www.ijpmonline.org/text.asp?2010/53/2/373/64286


Sir,

This is with reference to the article by Naik et al 'Choristoma of the base of the tongue', Indian J Pathol Microbiol 2009;52:86-7. [1] The definition of choristoma stated by the author is erroneous. In simple words choristoma is an ectopic rest of normal tissue. These are proliferation of any histologically normal tissue in an abnormal location. [2] In the oral cavity, they may consist of proliferation of bone, cartilage, fat, neural and glial tissue, thyroid gland, respiratory, gastric or intestinal mucosa. [3]

Choristomas can occur anywhere in the body. Lymph node may contain salivary gland, thyroid follicles, squamous or mullerian epithelium and nevus cell rests. Salivary gland choristomas in middle ear, neuromuscular and rhabdomyomatous choristomas in central nervous system, granular cell choristoma of neurohypophysis, phakomatous choristoma of eye, cartilage choristoma of uterus, have been documented in literature. [4]

The author says that choristoma is a benign tumor where new bone formation occurs, and it occurs in the flat bones of the skull and face. [1] This statement is a self-contradictory one. There is a definite difference between choristoma and hamartoma. A hamartoma is also a benign lesion, which is composed of tissue elements normally found at that site, but are growing in a disorganized mass. [2],[4] The component elements of hamartoma are not foreign to that organ or tissue.

Choristomas are also not neoplastic lesions. [3],[4] Many a times they are found in the form of rests, without forming a mass lesion. Although neuromuscular hamartoma, composed of neural and skeletal muscle differentiation has been referred to as 'benign triton tumor', but it is technically incorrect. This has also been proved by karyotyping. [4]

 
   References Top

1.Naik VR, Wan Faiziah WA, Musa MY. Choristoma of the base of the tongue. Indian J Pathol Microbiol 2009;52:86-7.  Back to cited text no. 1  [PUBMED]  Medknow Journal  
2.Raymond L, editor. Stedman's Medical Dictionary, 28 th edition. Philadelphia: Lippincott Williams and Wilkins; 2006.   Back to cited text no. 2      
3.Bansal R, Trivedi P, Patel S. Cartilaginous choristoma of the tongue - report of two cases and review of literature. Oral Oncol Extra 2005;41:25-9.  Back to cited text no. 3      
4.Rosai J, editor. Rosai and Ackerman's Surgical pathology, 9 th edition. New York: Mosby; 1996.  Back to cited text no. 4      

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DOI: 10.4103/0377-4929.64286

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